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emb_domain_zero {f : Γ ↪o Γ'} : emb_domain f (0 : hahn_series Γ R) = 0
by { ext, simp [emb_domain_notin_image_support] }
lemma
hahn_series.emb_domain_zero
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "hahn_series" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
emb_domain_single {f : Γ ↪o Γ'} {g : Γ} {r : R} : emb_domain f (single g r) = single (f g) r
begin ext g', by_cases h : g' = f g, { simp [h] }, rw [emb_domain_notin_image_support, single_coeff_of_ne h], by_cases hr : r = 0, { simp [hr] }, rwa [support_single_of_ne hr, set.image_singleton, set.mem_singleton_iff], end
lemma
hahn_series.emb_domain_single
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "set.image_singleton", "set.mem_singleton_iff" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
emb_domain_injective {f : Γ ↪o Γ'} : function.injective (emb_domain f : hahn_series Γ R → hahn_series Γ' R)
λ x y xy, begin ext g, rw [ext_iff, function.funext_iff] at xy, have xyg := xy (f g), rwa [emb_domain_coeff, emb_domain_coeff] at xyg, end
lemma
hahn_series.emb_domain_injective
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "function.funext_iff", "hahn_series" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
add_coeff' {x y : hahn_series Γ R} : (x + y).coeff = x.coeff + y.coeff
rfl
lemma
hahn_series.add_coeff'
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "hahn_series" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
add_coeff {x y : hahn_series Γ R} {a : Γ} : (x + y).coeff a = x.coeff a + y.coeff a
rfl
lemma
hahn_series.add_coeff
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "hahn_series" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
support_add_subset {x y : hahn_series Γ R} : support (x + y) ⊆ support x ∪ support y
λ a ha, begin rw [mem_support, add_coeff] at ha, rw [set.mem_union, mem_support, mem_support], contrapose! ha, rw [ha.1, ha.2, add_zero], end
lemma
hahn_series.support_add_subset
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "hahn_series", "set.mem_union" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
min_order_le_order_add {Γ} [linear_ordered_cancel_add_comm_monoid Γ] {x y : hahn_series Γ R} (hxy : x + y ≠ 0) : min x.order y.order ≤ (x + y).order
begin by_cases hx : x = 0, { simp [hx], }, by_cases hy : y = 0, { simp [hy], }, rw [order_of_ne hx, order_of_ne hy, order_of_ne hxy], refine le_trans _ (set.is_wf.min_le_min_of_subset support_add_subset), { exact x.is_wf_support.union y.is_wf_support }, { exact set.nonempty.mono (set.subset_union_left _ _) ...
lemma
hahn_series.min_order_le_order_add
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "hahn_series", "linear_ordered_cancel_add_comm_monoid", "set.is_wf.min_le_min_of_subset", "set.is_wf.min_union", "set.nonempty.mono", "set.subset_union_left" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
single.add_monoid_hom (a : Γ) : R →+ (hahn_series Γ R)
{ map_add' := λ x y, by { ext b, by_cases h : b = a; simp [h] }, ..single a }
def
hahn_series.single.add_monoid_hom
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "hahn_series" ]
`single` as an additive monoid/group homomorphism
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
coeff.add_monoid_hom (g : Γ) : (hahn_series Γ R) →+ R
{ to_fun := λ f, f.coeff g, map_zero' := zero_coeff, map_add' := λ x y, add_coeff }
def
hahn_series.coeff.add_monoid_hom
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "hahn_series" ]
`coeff g` as an additive monoid/group homomorphism
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
emb_domain_add (f : Γ ↪o Γ') (x y : hahn_series Γ R) : emb_domain f (x + y) = emb_domain f x + emb_domain f y
begin ext g, by_cases hg : g ∈ set.range f, { obtain ⟨a, rfl⟩ := hg, simp }, { simp [emb_domain_notin_range, hg] } end
lemma
hahn_series.emb_domain_add
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "hahn_series", "set.range" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
neg_coeff' {x : hahn_series Γ R} : (- x).coeff = - x.coeff
rfl
lemma
hahn_series.neg_coeff'
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "hahn_series" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
neg_coeff {x : hahn_series Γ R} {a : Γ} : (- x).coeff a = - x.coeff a
rfl
lemma
hahn_series.neg_coeff
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "hahn_series" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
support_neg {x : hahn_series Γ R} : (- x).support = x.support
by { ext, simp }
lemma
hahn_series.support_neg
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "hahn_series" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
sub_coeff' {x y : hahn_series Γ R} : (x - y).coeff = x.coeff - y.coeff
by { ext, simp [sub_eq_add_neg] }
lemma
hahn_series.sub_coeff'
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "hahn_series" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
sub_coeff {x y : hahn_series Γ R} {a : Γ} : (x - y).coeff a = x.coeff a - y.coeff a
by simp
lemma
hahn_series.sub_coeff
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "hahn_series" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
order_neg [has_zero Γ] {f : hahn_series Γ R} : (- f).order = f.order
by { by_cases hf : f = 0, { simp only [hf, neg_zero] }, simp only [order, support_neg, neg_eq_zero] }
lemma
hahn_series.order_neg
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "hahn_series" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
smul_coeff {r : R} {x : hahn_series Γ V} {a : Γ} : (r • x).coeff a = r • (x.coeff a)
rfl
lemma
hahn_series.smul_coeff
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "hahn_series" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
single.linear_map (a : Γ) : R →ₗ[R] (hahn_series Γ R)
{ map_smul' := λ r s, by { ext b, by_cases h : b = a; simp [h] }, ..single.add_monoid_hom a }
def
hahn_series.single.linear_map
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "hahn_series" ]
`single` as a linear map
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
coeff.linear_map (g : Γ) : (hahn_series Γ R) →ₗ[R] R
{ map_smul' := λ r s, rfl, ..coeff.add_monoid_hom g }
def
hahn_series.coeff.linear_map
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "hahn_series" ]
`coeff g` as a linear map
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
emb_domain_smul (f : Γ ↪o Γ') (r : R) (x : hahn_series Γ R) : emb_domain f (r • x) = r • emb_domain f x
begin ext g, by_cases hg : g ∈ set.range f, { obtain ⟨a, rfl⟩ := hg, simp }, { simp [emb_domain_notin_range, hg] } end
lemma
hahn_series.emb_domain_smul
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "hahn_series", "set.range" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
emb_domain_linear_map (f : Γ ↪o Γ') : hahn_series Γ R →ₗ[R] hahn_series Γ' R
{ to_fun := emb_domain f, map_add' := emb_domain_add f, map_smul' := emb_domain_smul f }
def
hahn_series.emb_domain_linear_map
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "hahn_series" ]
Extending the domain of Hahn series is a linear map.
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
one_coeff [has_zero R] [has_one R] {a : Γ} : (1 : hahn_series Γ R).coeff a = if a = 0 then 1 else 0
single_coeff
lemma
hahn_series.one_coeff
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "hahn_series" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
single_zero_one [has_zero R] [has_one R] : (single 0 (1 : R)) = 1
rfl
lemma
hahn_series.single_zero_one
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
support_one [mul_zero_one_class R] [nontrivial R] : support (1 : hahn_series Γ R) = {0}
support_single_of_ne one_ne_zero
lemma
hahn_series.support_one
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "hahn_series", "mul_zero_one_class", "nontrivial", "one_ne_zero" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
order_one [mul_zero_one_class R] : order (1 : hahn_series Γ R) = 0
begin cases subsingleton_or_nontrivial R with h h; haveI := h, { rw [subsingleton.elim (1 : hahn_series Γ R) 0, order_zero] }, { exact order_single one_ne_zero } end
lemma
hahn_series.order_one
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "hahn_series", "mul_zero_one_class", "one_ne_zero", "subsingleton_or_nontrivial" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
mul_coeff [non_unital_non_assoc_semiring R] {x y : hahn_series Γ R} {a : Γ} : (x * y).coeff a = ∑ ij in (add_antidiagonal x.is_pwo_support y.is_pwo_support a), x.coeff ij.fst * y.coeff ij.snd
rfl
lemma
hahn_series.mul_coeff
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "hahn_series", "non_unital_non_assoc_semiring" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
mul_coeff_right' [non_unital_non_assoc_semiring R] {x y : hahn_series Γ R} {a : Γ} {s : set Γ} (hs : s.is_pwo) (hys : y.support ⊆ s) : (x * y).coeff a = ∑ ij in (add_antidiagonal x.is_pwo_support hs a), x.coeff ij.fst * y.coeff ij.snd
begin rw mul_coeff, apply sum_subset_zero_on_sdiff (add_antidiagonal_mono_right hys) _ (λ _ _, rfl), intros b hb, simp only [not_and, mem_sdiff, mem_add_antidiagonal, mem_support, not_imp_not] at hb, rw [hb.2 hb.1.1 hb.1.2.2, mul_zero], end
lemma
hahn_series.mul_coeff_right'
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "hahn_series", "mul_zero", "non_unital_non_assoc_semiring", "not_and", "not_imp_not" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
mul_coeff_left' [non_unital_non_assoc_semiring R] {x y : hahn_series Γ R} {a : Γ} {s : set Γ} (hs : s.is_pwo) (hxs : x.support ⊆ s) : (x * y).coeff a = ∑ ij in (add_antidiagonal hs y.is_pwo_support a), x.coeff ij.fst * y.coeff ij.snd
begin rw mul_coeff, apply sum_subset_zero_on_sdiff (add_antidiagonal_mono_left hxs) _ (λ _ _, rfl), intros b hb, simp only [not_and', mem_sdiff, mem_add_antidiagonal, mem_support, not_ne_iff] at hb, rw [hb.2 ⟨hb.1.2.1, hb.1.2.2⟩, zero_mul], end
lemma
hahn_series.mul_coeff_left'
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "hahn_series", "non_unital_non_assoc_semiring", "not_and'", "not_ne_iff", "zero_mul" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
single_mul_coeff_add [non_unital_non_assoc_semiring R] {r : R} {x : hahn_series Γ R} {a : Γ} {b : Γ} : ((single b r) * x).coeff (a + b) = r * x.coeff a
begin by_cases hr : r = 0, { simp [hr] }, simp only [hr, smul_coeff, mul_coeff, support_single_of_ne, ne.def, not_false_iff, smul_eq_mul], by_cases hx : x.coeff a = 0, { simp only [hx, mul_zero], rw [sum_congr _ (λ _ _, rfl), sum_empty], ext ⟨a1, a2⟩, simp only [not_mem_empty, not_and, set.mem_sin...
lemma
hahn_series.single_mul_coeff_add
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "hahn_series", "mul_zero", "non_unital_non_assoc_semiring", "not_and", "not_not", "prod.mk.inj_iff", "set.mem_singleton_iff", "smul_eq_mul" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
mul_single_coeff_add [non_unital_non_assoc_semiring R] {r : R} {x : hahn_series Γ R} {a : Γ} {b : Γ} : (x * (single b r)).coeff (a + b) = x.coeff a * r
begin by_cases hr : r = 0, { simp [hr] }, simp only [hr, smul_coeff, mul_coeff, support_single_of_ne, ne.def, not_false_iff, smul_eq_mul], by_cases hx : x.coeff a = 0, { simp only [hx, zero_mul], rw [sum_congr _ (λ _ _, rfl), sum_empty], ext ⟨a1, a2⟩, simp only [not_mem_empty, not_and, set.mem_sin...
lemma
hahn_series.mul_single_coeff_add
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "hahn_series", "non_unital_non_assoc_semiring", "not_and", "not_not", "prod.mk.inj_iff", "set.mem_singleton_iff", "smul_eq_mul", "zero_mul" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
mul_single_zero_coeff [non_unital_non_assoc_semiring R] {r : R} {x : hahn_series Γ R} {a : Γ} : (x * (single 0 r)).coeff a = x.coeff a * r
by rw [← add_zero a, mul_single_coeff_add, add_zero]
lemma
hahn_series.mul_single_zero_coeff
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "hahn_series", "non_unital_non_assoc_semiring" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
single_zero_mul_coeff [non_unital_non_assoc_semiring R] {r : R} {x : hahn_series Γ R} {a : Γ} : ((single 0 r) * x).coeff a = r * x.coeff a
by rw [← add_zero a, single_mul_coeff_add, add_zero]
lemma
hahn_series.single_zero_mul_coeff
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "hahn_series", "non_unital_non_assoc_semiring" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
single_zero_mul_eq_smul [semiring R] {r : R} {x : hahn_series Γ R} : (single 0 r) * x = r • x
by { ext, exact single_zero_mul_coeff }
lemma
hahn_series.single_zero_mul_eq_smul
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "hahn_series", "semiring" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
support_mul_subset_add_support [non_unital_non_assoc_semiring R] {x y : hahn_series Γ R} : support (x * y) ⊆ support x + support y
begin apply set.subset.trans (λ x hx, _) support_add_antidiagonal_subset_add, { exact x.is_pwo_support }, { exact y.is_pwo_support }, contrapose! hx, simp only [not_nonempty_iff_eq_empty, ne.def, set.mem_set_of_eq] at hx, simp [hx], end
theorem
hahn_series.support_mul_subset_add_support
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "hahn_series", "non_unital_non_assoc_semiring", "set.subset.trans" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
mul_coeff_order_add_order {Γ} [linear_ordered_cancel_add_comm_monoid Γ] [non_unital_non_assoc_semiring R] (x y : hahn_series Γ R) : (x * y).coeff (x.order + y.order) = x.coeff x.order * y.coeff y.order
begin by_cases hx : x = 0, { simp [hx], }, by_cases hy : y = 0, { simp [hy], }, rw [order_of_ne hx, order_of_ne hy, mul_coeff, finset.add_antidiagonal_min_add_min, finset.sum_singleton], end
lemma
hahn_series.mul_coeff_order_add_order
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "hahn_series", "linear_ordered_cancel_add_comm_monoid", "non_unital_non_assoc_semiring" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
mul_assoc' [non_unital_semiring R] (x y z : hahn_series Γ R) : x * y * z = x * (y * z)
begin ext b, rw [mul_coeff_left' (x.is_pwo_support.add y.is_pwo_support) support_mul_subset_add_support, mul_coeff_right' (y.is_pwo_support.add z.is_pwo_support) support_mul_subset_add_support], simp only [mul_coeff, add_coeff, sum_mul, mul_sum, sum_sigma'], refine sum_bij_ne_zero (λ a has ha0, ⟨⟨a.2.1, a...
lemma
hahn_series.mul_assoc'
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "con", "exists_prop", "hahn_series", "heq_iff_eq", "mul_assoc", "non_unital_semiring", "prod.mk.inj_iff", "set.image_prod" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
order_mul {Γ} [linear_ordered_cancel_add_comm_monoid Γ] [non_unital_non_assoc_semiring R] [no_zero_divisors R] {x y : hahn_series Γ R} (hx : x ≠ 0) (hy : y ≠ 0) : (x * y).order = x.order + y.order
begin apply le_antisymm, { apply order_le_of_coeff_ne_zero, rw [mul_coeff_order_add_order x y], exact mul_ne_zero (coeff_order_ne_zero hx) (coeff_order_ne_zero hy) }, { rw [order_of_ne hx, order_of_ne hy, order_of_ne (mul_ne_zero hx hy), ← set.is_wf.min_add], exact set.is_wf.min_le_min_of_subset (supp...
lemma
hahn_series.order_mul
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "hahn_series", "linear_ordered_cancel_add_comm_monoid", "mul_ne_zero", "no_zero_divisors", "non_unital_non_assoc_semiring", "set.is_wf.min_le_min_of_subset" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
order_pow {Γ} [linear_ordered_cancel_add_comm_monoid Γ] [semiring R] [no_zero_divisors R] (x : hahn_series Γ R) (n : ℕ) : (x ^ n).order = n • x.order
begin induction n with h IH, { simp }, rcases eq_or_ne x 0 with rfl|hx, { simp }, rw [pow_succ', order_mul (pow_ne_zero _ hx) hx, succ_nsmul', IH] end
lemma
hahn_series.order_pow
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "eq_or_ne", "hahn_series", "linear_ordered_cancel_add_comm_monoid", "no_zero_divisors", "pow_ne_zero", "pow_succ'", "semiring" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
single_mul_single {a b : Γ} {r s : R} : single a r * single b s = single (a + b) (r * s)
begin ext x, by_cases h : x = a + b, { rw [h, mul_single_coeff_add], simp }, { rw [single_coeff_of_ne h, mul_coeff, sum_eq_zero], simp_rw mem_add_antidiagonal, rintro ⟨y, z⟩ ⟨hy, hz, rfl⟩, rw [eq_of_mem_support_single hy, eq_of_mem_support_single hz] at h, exact (h rfl).elim } end
lemma
hahn_series.single_mul_single
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
C : R →+* (hahn_series Γ R)
{ to_fun := single 0, map_zero' := single_eq_zero, map_one' := rfl, map_add' := λ x y, by { ext a, by_cases h : a = 0; simp [h] }, map_mul' := λ x y, by rw [single_mul_single, zero_add] }
def
hahn_series.C
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "hahn_series" ]
`C a` is the constant Hahn Series `a`. `C` is provided as a ring homomorphism.
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
C_zero : C (0 : R) = (0 : hahn_series Γ R)
C.map_zero
lemma
hahn_series.C_zero
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "hahn_series" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
C_one : C (1 : R) = (1 : hahn_series Γ R)
C.map_one
lemma
hahn_series.C_one
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "hahn_series" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
C_injective : function.injective (C : R → hahn_series Γ R)
begin intros r s rs, rw [ext_iff, function.funext_iff] at rs, have h := rs 0, rwa [C_apply, single_coeff_same, C_apply, single_coeff_same] at h, end
lemma
hahn_series.C_injective
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "function.funext_iff", "hahn_series" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
C_ne_zero {r : R} (h : r ≠ 0) : (C r : hahn_series Γ R) ≠ 0
begin contrapose! h, rw ← C_zero at h, exact C_injective h, end
lemma
hahn_series.C_ne_zero
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "hahn_series" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
order_C {r : R} : order (C r : hahn_series Γ R) = 0
begin by_cases h : r = 0, { rw [h, C_zero, order_zero] }, { exact order_single h } end
lemma
hahn_series.order_C
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "hahn_series" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
C_mul_eq_smul {r : R} {x : hahn_series Γ R} : C r * x = r • x
single_zero_mul_eq_smul
lemma
hahn_series.C_mul_eq_smul
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "hahn_series" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
emb_domain_mul [non_unital_non_assoc_semiring R] (f : Γ ↪o Γ') (hf : ∀ x y, f (x + y) = f x + f y) (x y : hahn_series Γ R) : emb_domain f (x * y) = emb_domain f x * emb_domain f y
begin ext g, by_cases hg : g ∈ set.range f, { obtain ⟨g, rfl⟩ := hg, simp only [mul_coeff, emb_domain_coeff], transitivity ∑ ij in (add_antidiagonal x.is_pwo_support y.is_pwo_support g).map (function.embedding.prod_map f.to_embedding f.to_embedding), (emb_domain f x).coeff (ij.1) * (emb_...
lemma
hahn_series.emb_domain_mul
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "exists_prop", "function.embedding.coe_prod_map", "function.embedding.prod_map", "hahn_series", "mem_map", "ne_zero_and_ne_zero_of_mul", "non_unital_non_assoc_semiring", "order_embedding.eq_iff_eq", "prod.mk.inj_iff", "set.range" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
emb_domain_one [non_assoc_semiring R] (f : Γ ↪o Γ') (hf : f 0 = 0): emb_domain f (1 : hahn_series Γ R) = (1 : hahn_series Γ' R)
emb_domain_single.trans $ hf.symm ▸ rfl
lemma
hahn_series.emb_domain_one
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "hahn_series", "non_assoc_semiring" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
emb_domain_ring_hom [non_assoc_semiring R] (f : Γ →+ Γ') (hfi : function.injective f) (hf : ∀ g g' : Γ, f g ≤ f g' ↔ g ≤ g') : hahn_series Γ R →+* hahn_series Γ' R
{ to_fun := emb_domain ⟨⟨f, hfi⟩, hf⟩, map_one' := emb_domain_one _ f.map_zero, map_mul' := emb_domain_mul _ f.map_add, map_zero' := emb_domain_zero, map_add' := emb_domain_add _}
def
hahn_series.emb_domain_ring_hom
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "hahn_series", "non_assoc_semiring" ]
Extending the domain of Hahn series is a ring homomorphism.
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
emb_domain_ring_hom_C [non_assoc_semiring R] {f : Γ →+ Γ'} {hfi : function.injective f} {hf : ∀ g g' : Γ, f g ≤ f g' ↔ g ≤ g'} {r : R} : emb_domain_ring_hom f hfi hf (C r) = C r
emb_domain_single.trans (by simp)
lemma
hahn_series.emb_domain_ring_hom_C
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "non_assoc_semiring" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
C_eq_algebra_map : C = (algebra_map R (hahn_series Γ R))
rfl
theorem
hahn_series.C_eq_algebra_map
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "algebra_map", "hahn_series" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
algebra_map_apply {r : R} : algebra_map R (hahn_series Γ A) r = C (algebra_map R A r)
rfl
theorem
hahn_series.algebra_map_apply
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "algebra_map", "algebra_map_apply", "hahn_series" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
emb_domain_alg_hom (f : Γ →+ Γ') (hfi : function.injective f) (hf : ∀ g g' : Γ, f g ≤ f g' ↔ g ≤ g') : hahn_series Γ A →ₐ[R] hahn_series Γ' A
{ commutes' := λ r, emb_domain_ring_hom_C, .. emb_domain_ring_hom f hfi hf }
def
hahn_series.emb_domain_alg_hom
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "hahn_series" ]
Extending the domain of Hahn series is an algebra homomorphism.
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
to_power_series : hahn_series ℕ R ≃+* power_series R
{ to_fun := λ f, power_series.mk f.coeff, inv_fun := λ f, ⟨λ n, power_series.coeff R n f, (nat.lt_wf.is_wf _).is_pwo⟩, left_inv := λ f, by { ext, simp }, right_inv := λ f, by { ext, simp }, map_add' := λ f g, by { ext, simp }, map_mul' := λ f g, begin ext n, simp only [power_series.coeff_mul, power_se...
def
hahn_series.to_power_series
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "and.congr_left_iff", "hahn_series", "inv_fun", "left_ne_zero_of_mul", "power_series", "power_series.coeff", "power_series.coeff_mk", "power_series.coeff_mul", "power_series.mk", "right_ne_zero_of_mul" ]
The ring `hahn_series ℕ R` is isomorphic to `power_series R`.
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
coeff_to_power_series {f : hahn_series ℕ R} {n : ℕ} : power_series.coeff R n f.to_power_series = f.coeff n
power_series.coeff_mk _ _
lemma
hahn_series.coeff_to_power_series
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "hahn_series", "power_series.coeff", "power_series.coeff_mk" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
coeff_to_power_series_symm {f : power_series R} {n : ℕ} : (hahn_series.to_power_series.symm f).coeff n = power_series.coeff R n f
rfl
lemma
hahn_series.coeff_to_power_series_symm
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "power_series", "power_series.coeff" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
of_power_series : (power_series R) →+* hahn_series Γ R
(hahn_series.emb_domain_ring_hom (nat.cast_add_monoid_hom Γ) nat.strict_mono_cast.injective (λ _ _, nat.cast_le)).comp (ring_equiv.to_ring_hom to_power_series.symm)
def
hahn_series.of_power_series
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "hahn_series", "hahn_series.emb_domain_ring_hom", "nat.cast_add_monoid_hom", "nat.cast_le", "power_series", "ring_equiv.to_ring_hom" ]
Casts a power series as a Hahn series with coefficients from an `strict_ordered_semiring`.
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
of_power_series_injective : function.injective (of_power_series Γ R)
emb_domain_injective.comp to_power_series.symm.injective
lemma
hahn_series.of_power_series_injective
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
of_power_series_apply (x : power_series R) : of_power_series Γ R x = hahn_series.emb_domain ⟨⟨(coe : ℕ → Γ), nat.strict_mono_cast.injective⟩, λ a b, begin simp only [function.embedding.coe_fn_mk], exact nat.cast_le, end⟩ (to_power_series.symm x)
rfl
lemma
hahn_series.of_power_series_apply
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "function.embedding.coe_fn_mk", "hahn_series.emb_domain", "nat.cast_le", "power_series" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
of_power_series_apply_coeff (x : power_series R) (n : ℕ) : (of_power_series Γ R x).coeff n = power_series.coeff R n x
by simp
lemma
hahn_series.of_power_series_apply_coeff
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "power_series", "power_series.coeff" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
of_power_series_C (r : R) : of_power_series Γ R (power_series.C R r) = hahn_series.C r
begin ext n, simp only [C, single_coeff, of_power_series_apply, ring_hom.coe_mk], split_ifs with hn hn, { subst hn, convert @emb_domain_coeff _ _ _ _ _ _ _ _ 0; simp }, { rw emb_domain_notin_image_support, simp only [not_exists, set.mem_image, to_power_series_symm_apply_coeff, mem_support, ...
lemma
hahn_series.of_power_series_C
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "hahn_series.C", "not_exists", "power_series.C", "power_series.coeff_C", "ring_hom.coe_mk", "set.mem_image" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
of_power_series_X : of_power_series Γ R power_series.X = single 1 1
begin ext n, simp only [single_coeff, of_power_series_apply, ring_hom.coe_mk], split_ifs with hn hn, { rw hn, convert @emb_domain_coeff _ _ _ _ _ _ _ _ 1; simp }, { rw emb_domain_notin_image_support, simp only [not_exists, set.mem_image, to_power_series_symm_apply_coeff, mem_support, ...
lemma
hahn_series.of_power_series_X
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "not_exists", "power_series.X", "power_series.coeff_X", "ring_hom.coe_mk", "set.mem_image" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
of_power_series_X_pow {R} [comm_semiring R] (n : ℕ) : of_power_series Γ R (power_series.X ^ n) = single (n : Γ) 1
begin rw ring_hom.map_pow, induction n with n ih, { simp, refl }, rw [pow_succ, ih, of_power_series_X, mul_comm, single_mul_single, one_mul, nat.cast_succ] end
lemma
hahn_series.of_power_series_X_pow
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "comm_semiring", "ih", "mul_comm", "nat.cast_succ", "one_mul", "pow_succ", "power_series.X", "ring_hom.map_pow" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
to_mv_power_series {σ : Type*} [fintype σ] : hahn_series (σ →₀ ℕ) R ≃+* mv_power_series σ R
{ to_fun := λ f, f.coeff, inv_fun := λ f, ⟨(f : (σ →₀ ℕ) → R), finsupp.is_pwo _⟩, left_inv := λ f, by { ext, simp }, right_inv := λ f, by { ext, simp }, map_add' := λ f g, by { ext, simp }, map_mul' := λ f g, begin ext n, simp only [mv_power_series.coeff_mul], classical, change (f * g).coeff n...
def
hahn_series.to_mv_power_series
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "and.congr_left_iff", "finsupp.is_pwo", "finsupp.mem_antidiagonal", "fintype", "hahn_series", "inv_fun", "left_ne_zero_of_mul", "mv_power_series", "mv_power_series.coeff_mul", "right_ne_zero_of_mul" ]
The ring `hahn_series (σ →₀ ℕ) R` is isomorphic to `mv_power_series σ R` for a `fintype` `σ`. We take the index set of the hahn series to be `finsupp` rather than `pi`, even though we assume `fintype σ` as this is more natural for alignment with `mv_power_series`. After importing `algebra.order.pi` the ring `hahn_serie...
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
coeff_to_mv_power_series {f : hahn_series (σ →₀ ℕ) R} {n : σ →₀ ℕ} : mv_power_series.coeff R n f.to_mv_power_series = f.coeff n
rfl
lemma
hahn_series.coeff_to_mv_power_series
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "hahn_series", "mv_power_series.coeff" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
coeff_to_mv_power_series_symm {f : mv_power_series σ R} {n : σ →₀ ℕ} : (hahn_series.to_mv_power_series.symm f).coeff n = mv_power_series.coeff R n f
rfl
lemma
hahn_series.coeff_to_mv_power_series_symm
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "mv_power_series", "mv_power_series.coeff" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
to_power_series_alg : (hahn_series ℕ A) ≃ₐ[R] power_series A
{ commutes' := λ r, begin ext n, simp only [algebra_map_apply, power_series.algebra_map_apply, ring_equiv.to_fun_eq_coe, C_apply, coeff_to_power_series], cases n, { simp only [power_series.coeff_zero_eq_constant_coeff, single_coeff_same], refl }, { simp only [n.succ_ne_zero, ne.def, not_...
def
hahn_series.to_power_series_alg
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "algebra_map_apply", "hahn_series", "power_series", "power_series.algebra_map_apply", "power_series.coeff_C", "power_series.coeff_zero_eq_constant_coeff", "ring_equiv.to_fun_eq_coe" ]
The `R`-algebra `hahn_series ℕ A` is isomorphic to `power_series A`.
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
of_power_series_alg : (power_series A) →ₐ[R] hahn_series Γ A
(hahn_series.emb_domain_alg_hom (nat.cast_add_monoid_hom Γ) nat.strict_mono_cast.injective (λ _ _, nat.cast_le)).comp (alg_equiv.to_alg_hom (to_power_series_alg R).symm)
def
hahn_series.of_power_series_alg
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "alg_equiv.to_alg_hom", "hahn_series", "hahn_series.emb_domain_alg_hom", "nat.cast_add_monoid_hom", "nat.cast_le", "power_series" ]
Casting a power series as a Hahn series with coefficients from an `strict_ordered_semiring` is an algebra homomorphism.
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
power_series_algebra {S : Type*} [comm_semiring S] [algebra S (power_series R)] : algebra S (hahn_series Γ R)
ring_hom.to_algebra $ (of_power_series Γ R).comp (algebra_map S (power_series R))
instance
hahn_series.power_series_algebra
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "algebra", "algebra_map", "comm_semiring", "hahn_series", "power_series", "ring_hom.to_algebra" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
algebra_map_apply' (x : S) : algebra_map S (hahn_series Γ R) x = of_power_series Γ R (algebra_map S (power_series R) x)
rfl
lemma
hahn_series.algebra_map_apply'
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "algebra_map", "hahn_series", "power_series" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
_root_.polynomial.algebra_map_hahn_series_apply (f : R[X]) : algebra_map R[X] (hahn_series Γ R) f = of_power_series Γ R f
rfl
lemma
polynomial.algebra_map_hahn_series_apply
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "algebra_map", "hahn_series" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
_root_.polynomial.algebra_map_hahn_series_injective : function.injective (algebra_map R[X] (hahn_series Γ R))
of_power_series_injective.comp (polynomial.coe_injective R)
lemma
polynomial.algebra_map_hahn_series_injective
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "algebra_map", "hahn_series", "polynomial.coe_injective" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
add_val : add_valuation (hahn_series Γ R) (with_top Γ)
add_valuation.of (λ x, if x = (0 : hahn_series Γ R) then (⊤ : with_top Γ) else x.order) (if_pos rfl) ((if_neg one_ne_zero).trans (by simp [order_of_ne])) (λ x y, begin by_cases hx : x = 0, { by_cases hy : y = 0; { simp [hx, hy] } }, { by_cases hy : y = 0, { simp [hx, hy] }, { simp only [hx...
def
hahn_series.add_val
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "add_valuation", "add_valuation.of", "hahn_series", "mul_ne_zero", "one_ne_zero", "with_top", "with_top.coe_add", "with_top.coe_eq_coe", "with_top.coe_le_coe", "with_top.coe_min" ]
The additive valuation on `hahn_series Γ R`, returning the smallest index at which a Hahn Series has a nonzero coefficient, or `⊤` for the 0 series.
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
add_val_apply {x : hahn_series Γ R} : add_val Γ R x = if x = (0 : hahn_series Γ R) then (⊤ : with_top Γ) else x.order
add_valuation.of_apply _
lemma
hahn_series.add_val_apply
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "add_valuation.of_apply", "hahn_series", "with_top" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
add_val_apply_of_ne {x : hahn_series Γ R} (hx : x ≠ 0) : add_val Γ R x = x.order
if_neg hx
lemma
hahn_series.add_val_apply_of_ne
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "hahn_series" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
add_val_le_of_coeff_ne_zero {x : hahn_series Γ R} {g : Γ} (h : x.coeff g ≠ 0) : add_val Γ R x ≤ g
begin rw [add_val_apply_of_ne (ne_zero_of_coeff_ne_zero h), with_top.coe_le_coe], exact order_le_of_coeff_ne_zero h end
lemma
hahn_series.add_val_le_of_coeff_ne_zero
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "hahn_series", "with_top.coe_le_coe" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
is_pwo_Union_support_powers [linear_ordered_cancel_add_comm_monoid Γ] [ring R] [is_domain R] {x : hahn_series Γ R} (hx : 0 < add_val Γ R x) : (⋃ n : ℕ, (x ^ n).support).is_pwo
begin apply (x.is_wf_support.is_pwo.add_submonoid_closure (λ g hg, _)).mono _, { exact with_top.coe_le_coe.1 (le_trans (le_of_lt hx) (add_val_le_of_coeff_ne_zero hg)) }, refine set.Union_subset (λ n, _), induction n with n ih; intros g hn, { simp only [exists_prop, and_true, set.mem_singleton_iff, set.set_o...
lemma
hahn_series.is_pwo_Union_support_powers
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "exists_prop", "hahn_series", "ih", "is_domain", "ite_eq_right_iff", "linear_ordered_cancel_add_comm_monoid", "not_forall", "one_ne_zero", "pow_zero", "ring", "set.Union_subset", "set.mem_singleton_iff", "set.set_of_eq_eq_singleton", "set_like.mem_coe" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
summable_family (α : Type*)
(to_fun : α → hahn_series Γ R) (is_pwo_Union_support' : set.is_pwo (⋃ (a : α), (to_fun a).support)) (finite_co_support' : ∀ (g : Γ), ({a | (to_fun a).coeff g ≠ 0}).finite)
structure
hahn_series.summable_family
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "finite", "hahn_series", "set.is_pwo" ]
An infinite family of Hahn series which has a formal coefficient-wise sum. The requirements for this are that the union of the supports of the series is well-founded, and that only finitely many series are nonzero at any given coefficient.
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
is_pwo_Union_support (s : summable_family Γ R α) : set.is_pwo (⋃ (a : α), (s a).support)
s.is_pwo_Union_support'
lemma
hahn_series.summable_family.is_pwo_Union_support
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "set.is_pwo" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
finite_co_support (s : summable_family Γ R α) (g : Γ) : (function.support (λ a, (s a).coeff g)).finite
s.finite_co_support' g
lemma
hahn_series.summable_family.finite_co_support
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "finite", "function.support" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
coe_injective : @function.injective (summable_family Γ R α) (α → hahn_series Γ R) coe_fn
| ⟨f1, hU1, hf1⟩ ⟨f2, hU2, hf2⟩ h := begin change f1 = f2 at h, subst h, end
lemma
hahn_series.summable_family.coe_injective
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "hahn_series" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
ext {s t : summable_family Γ R α} (h : ∀ (a : α), s a = t a) : s = t
coe_injective $ funext h
lemma
hahn_series.summable_family.ext
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
coe_add {s t : summable_family Γ R α} : ⇑(s + t) = s + t
rfl
lemma
hahn_series.summable_family.coe_add
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
add_apply {s t : summable_family Γ R α} {a : α} : (s + t) a = s a + t a
rfl
lemma
hahn_series.summable_family.add_apply
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
coe_zero : ((0 : summable_family Γ R α) : α → hahn_series Γ R) = 0
rfl
lemma
hahn_series.summable_family.coe_zero
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "hahn_series" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
zero_apply {a : α} : (0 : summable_family Γ R α) a = 0
rfl
lemma
hahn_series.summable_family.zero_apply
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
hsum (s : summable_family Γ R α) : hahn_series Γ R
{ coeff := λ g, ∑ᶠ i, (s i).coeff g, is_pwo_support' := s.is_pwo_Union_support.mono (λ g, begin contrapose, rw [set.mem_Union, not_exists, function.mem_support, not_not], simp_rw [mem_support, not_not], intro h, rw [finsum_congr h, finsum_zero], end) }
def
hahn_series.summable_family.hsum
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "hahn_series", "not_exists", "not_not", "set.mem_Union" ]
The infinite sum of a `summable_family` of Hahn series.
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
hsum_coeff {s : summable_family Γ R α} {g : Γ} : s.hsum.coeff g = ∑ᶠ i, (s i).coeff g
rfl
lemma
hahn_series.summable_family.hsum_coeff
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
support_hsum_subset {s : summable_family Γ R α} : s.hsum.support ⊆ ⋃ (a : α), (s a).support
λ g hg, begin rw [mem_support, hsum_coeff, finsum_eq_sum _ (s.finite_co_support _)] at hg, obtain ⟨a, h1, h2⟩ := exists_ne_zero_of_sum_ne_zero hg, rw [set.mem_Union], exact ⟨a, h2⟩, end
lemma
hahn_series.summable_family.support_hsum_subset
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "set.mem_Union" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
hsum_add {s t : summable_family Γ R α} : (s + t).hsum = s.hsum + t.hsum
begin ext g, simp only [hsum_coeff, add_coeff, add_apply], exact finsum_add_distrib (s.finite_co_support _) (t.finite_co_support _) end
lemma
hahn_series.summable_family.hsum_add
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
coe_neg : ⇑(-s) = - s
rfl
lemma
hahn_series.summable_family.coe_neg
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
neg_apply : (-s) a = - (s a)
rfl
lemma
hahn_series.summable_family.neg_apply
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
coe_sub : ⇑(s - t) = s - t
rfl
lemma
hahn_series.summable_family.coe_sub
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
sub_apply : (s - t) a = s a - t a
rfl
lemma
hahn_series.summable_family.sub_apply
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
smul_apply {x : hahn_series Γ R} {s : summable_family Γ R α} {a : α} : (x • s) a = x * (s a)
rfl
lemma
hahn_series.summable_family.smul_apply
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "hahn_series" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
hsum_smul {x : hahn_series Γ R} {s : summable_family Γ R α} : (x • s).hsum = x * s.hsum
begin ext g, simp only [mul_coeff, hsum_coeff, smul_apply], have h : ∀ i, (s i).support ⊆ ⋃ j, (s j).support := set.subset_Union _, refine (eq.trans (finsum_congr (λ a, _)) (finsum_sum_comm (add_antidiagonal x.is_pwo_support s.is_pwo_Union_support g) (λ i ij, x.coeff (prod.fst ij) * (s i).coeff ij.snd) ...
lemma
hahn_series.summable_family.hsum_smul
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "con", "hahn_series", "mul_finsum", "mul_zero", "not_not", "set.mem_Union", "set.subset_Union" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
lsum : (summable_family Γ R α) →ₗ[hahn_series Γ R] (hahn_series Γ R)
{ to_fun := hsum, map_add' := λ _ _, hsum_add, map_smul' := λ _ _, hsum_smul }
def
hahn_series.summable_family.lsum
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "hahn_series" ]
The summation of a `summable_family` as a `linear_map`.
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
hsum_sub {R : Type*} [ring R] {s t : summable_family Γ R α} : (s - t).hsum = s.hsum - t.hsum
by rw [← lsum_apply, linear_map.map_sub, lsum_apply, lsum_apply]
lemma
hahn_series.summable_family.hsum_sub
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "linear_map.map_sub", "ring" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
of_finsupp (f : α →₀ (hahn_series Γ R)) : summable_family Γ R α
{ to_fun := f, is_pwo_Union_support' := begin apply (f.support.is_pwo_bUnion.2 $ λ a ha, (f a).is_pwo_support).mono, refine set.Union_subset_iff.2 (λ a g hg, _), have haf : a ∈ f.support, { rw [finsupp.mem_support_iff, ← support_nonempty_iff], exact ⟨g, hg⟩ }, exact set.mem_bUnio...
def
hahn_series.summable_family.of_finsupp
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "finsupp.mem_support_iff", "hahn_series", "set.mem_bUnion" ]
A family with only finitely many nonzero elements is summable.
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
coe_of_finsupp {f : α →₀ (hahn_series Γ R)} : ⇑(summable_family.of_finsupp f) = f
rfl
lemma
hahn_series.summable_family.coe_of_finsupp
ring_theory
src/ring_theory/hahn_series.lean
[ "order.well_founded_set", "algebra.big_operators.finprod", "ring_theory.valuation.basic", "ring_theory.power_series.basic", "data.finsupp.pwo", "data.finset.mul_antidiagonal", "algebra.order.group.with_top" ]
[ "hahn_series" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83