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mul_nonneg_of_three (a b c : α) : 0 ≤ a * b ∨ 0 ≤ b * c ∨ 0 ≤ c * a
by iterate 3 { rw mul_nonneg_iff }; have := le_total 0 a; have := le_total 0 b; have := le_total 0 c; itauto
lemma
mul_nonneg_of_three
algebra.order.ring
src/algebra/order/ring/defs.lean
[ "algebra.order.group.defs", "algebra.order.monoid.cancel.defs", "algebra.order.monoid.canonical.defs", "algebra.order.monoid.nat_cast", "algebra.order.monoid.with_zero.defs", "algebra.order.ring.lemmas", "algebra.ring.defs", "order.min_max", "tactic.nontriviality", "data.pi.algebra", "algebra.gr...
[ "itauto", "mul_nonneg_iff" ]
Out of three elements of a `linear_ordered_ring`, two must have the same sign.
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
mul_nonpos_iff : a * b ≤ 0 ↔ 0 ≤ a ∧ b ≤ 0 ∨ a ≤ 0 ∧ 0 ≤ b
by rw [← neg_nonneg, neg_mul_eq_mul_neg, mul_nonneg_iff, neg_nonneg, neg_nonpos]
lemma
mul_nonpos_iff
algebra.order.ring
src/algebra/order/ring/defs.lean
[ "algebra.order.group.defs", "algebra.order.monoid.cancel.defs", "algebra.order.monoid.canonical.defs", "algebra.order.monoid.nat_cast", "algebra.order.monoid.with_zero.defs", "algebra.order.ring.lemmas", "algebra.ring.defs", "order.min_max", "tactic.nontriviality", "data.pi.algebra", "algebra.gr...
[ "mul_nonneg_iff", "neg_mul_eq_mul_neg" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
mul_self_nonneg (a : α) : 0 ≤ a * a
(le_total 0 a).elim (λ h, mul_nonneg h h) (λ h, mul_nonneg_of_nonpos_of_nonpos h h)
lemma
mul_self_nonneg
algebra.order.ring
src/algebra/order/ring/defs.lean
[ "algebra.order.group.defs", "algebra.order.monoid.cancel.defs", "algebra.order.monoid.canonical.defs", "algebra.order.monoid.nat_cast", "algebra.order.monoid.with_zero.defs", "algebra.order.ring.lemmas", "algebra.ring.defs", "order.min_max", "tactic.nontriviality", "data.pi.algebra", "algebra.gr...
[ "mul_nonneg_of_nonpos_of_nonpos" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
neg_le_self_iff : -a ≤ a ↔ 0 ≤ a
by simp [neg_le_iff_add_nonneg, ← two_mul, mul_nonneg_iff, zero_le_one, (zero_lt_two' α).not_le]
lemma
neg_le_self_iff
algebra.order.ring
src/algebra/order/ring/defs.lean
[ "algebra.order.group.defs", "algebra.order.monoid.cancel.defs", "algebra.order.monoid.canonical.defs", "algebra.order.monoid.nat_cast", "algebra.order.monoid.with_zero.defs", "algebra.order.ring.lemmas", "algebra.ring.defs", "order.min_max", "tactic.nontriviality", "data.pi.algebra", "algebra.gr...
[ "mul_nonneg_iff", "two_mul", "zero_le_one", "zero_lt_two'" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
neg_lt_self_iff : -a < a ↔ 0 < a
by simp [neg_lt_iff_pos_add, ← two_mul, mul_pos_iff, zero_lt_one, (zero_lt_two' α).not_lt]
lemma
neg_lt_self_iff
algebra.order.ring
src/algebra/order/ring/defs.lean
[ "algebra.order.group.defs", "algebra.order.monoid.cancel.defs", "algebra.order.monoid.canonical.defs", "algebra.order.monoid.nat_cast", "algebra.order.monoid.with_zero.defs", "algebra.order.ring.lemmas", "algebra.ring.defs", "order.min_max", "tactic.nontriviality", "data.pi.algebra", "algebra.gr...
[ "mul_pos_iff", "two_mul", "zero_lt_one", "zero_lt_two'" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
le_neg_self_iff : a ≤ -a ↔ a ≤ 0
calc a ≤ -a ↔ -(-a) ≤ -a : by rw neg_neg ... ↔ 0 ≤ -a : neg_le_self_iff ... ↔ a ≤ 0 : neg_nonneg
lemma
le_neg_self_iff
algebra.order.ring
src/algebra/order/ring/defs.lean
[ "algebra.order.group.defs", "algebra.order.monoid.cancel.defs", "algebra.order.monoid.canonical.defs", "algebra.order.monoid.nat_cast", "algebra.order.monoid.with_zero.defs", "algebra.order.ring.lemmas", "algebra.ring.defs", "order.min_max", "tactic.nontriviality", "data.pi.algebra", "algebra.gr...
[ "neg_le_self_iff" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
lt_neg_self_iff : a < -a ↔ a < 0
calc a < -a ↔ -(-a) < -a : by rw neg_neg ... ↔ 0 < -a : neg_lt_self_iff ... ↔ a < 0 : neg_pos
lemma
lt_neg_self_iff
algebra.order.ring
src/algebra/order/ring/defs.lean
[ "algebra.order.group.defs", "algebra.order.monoid.cancel.defs", "algebra.order.monoid.canonical.defs", "algebra.order.monoid.nat_cast", "algebra.order.monoid.with_zero.defs", "algebra.order.ring.lemmas", "algebra.ring.defs", "order.min_max", "tactic.nontriviality", "data.pi.algebra", "algebra.gr...
[ "neg_lt_self_iff" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
neg_one_lt_zero : -1 < (0:α)
neg_lt_zero.2 zero_lt_one
lemma
neg_one_lt_zero
algebra.order.ring
src/algebra/order/ring/defs.lean
[ "algebra.order.group.defs", "algebra.order.monoid.cancel.defs", "algebra.order.monoid.canonical.defs", "algebra.order.monoid.nat_cast", "algebra.order.monoid.with_zero.defs", "algebra.order.ring.lemmas", "algebra.ring.defs", "order.min_max", "tactic.nontriviality", "data.pi.algebra", "algebra.gr...
[ "zero_lt_one" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
mul_le_mul_left_of_neg {a b c : α} (h : c < 0) : c * a ≤ c * b ↔ b ≤ a
(strict_anti_mul_left h).le_iff_le
lemma
mul_le_mul_left_of_neg
algebra.order.ring
src/algebra/order/ring/defs.lean
[ "algebra.order.group.defs", "algebra.order.monoid.cancel.defs", "algebra.order.monoid.canonical.defs", "algebra.order.monoid.nat_cast", "algebra.order.monoid.with_zero.defs", "algebra.order.ring.lemmas", "algebra.ring.defs", "order.min_max", "tactic.nontriviality", "data.pi.algebra", "algebra.gr...
[ "strict_anti_mul_left" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
mul_le_mul_right_of_neg {a b c : α} (h : c < 0) : a * c ≤ b * c ↔ b ≤ a
(strict_anti_mul_right h).le_iff_le
lemma
mul_le_mul_right_of_neg
algebra.order.ring
src/algebra/order/ring/defs.lean
[ "algebra.order.group.defs", "algebra.order.monoid.cancel.defs", "algebra.order.monoid.canonical.defs", "algebra.order.monoid.nat_cast", "algebra.order.monoid.with_zero.defs", "algebra.order.ring.lemmas", "algebra.ring.defs", "order.min_max", "tactic.nontriviality", "data.pi.algebra", "algebra.gr...
[ "strict_anti_mul_right" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
mul_lt_mul_left_of_neg {a b c : α} (h : c < 0) : c * a < c * b ↔ b < a
(strict_anti_mul_left h).lt_iff_lt
lemma
mul_lt_mul_left_of_neg
algebra.order.ring
src/algebra/order/ring/defs.lean
[ "algebra.order.group.defs", "algebra.order.monoid.cancel.defs", "algebra.order.monoid.canonical.defs", "algebra.order.monoid.nat_cast", "algebra.order.monoid.with_zero.defs", "algebra.order.ring.lemmas", "algebra.ring.defs", "order.min_max", "tactic.nontriviality", "data.pi.algebra", "algebra.gr...
[ "strict_anti_mul_left" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
mul_lt_mul_right_of_neg {a b c : α} (h : c < 0) : a * c < b * c ↔ b < a
(strict_anti_mul_right h).lt_iff_lt
lemma
mul_lt_mul_right_of_neg
algebra.order.ring
src/algebra/order/ring/defs.lean
[ "algebra.order.group.defs", "algebra.order.monoid.cancel.defs", "algebra.order.monoid.canonical.defs", "algebra.order.monoid.nat_cast", "algebra.order.monoid.with_zero.defs", "algebra.order.ring.lemmas", "algebra.ring.defs", "order.min_max", "tactic.nontriviality", "data.pi.algebra", "algebra.gr...
[ "strict_anti_mul_right" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
lt_of_mul_lt_mul_of_nonpos_left (h : c * a < c * b) (hc : c ≤ 0) : b < a
lt_of_mul_lt_mul_left (by rwa [neg_mul, neg_mul, neg_lt_neg_iff]) $ neg_nonneg.2 hc
lemma
lt_of_mul_lt_mul_of_nonpos_left
algebra.order.ring
src/algebra/order/ring/defs.lean
[ "algebra.order.group.defs", "algebra.order.monoid.cancel.defs", "algebra.order.monoid.canonical.defs", "algebra.order.monoid.nat_cast", "algebra.order.monoid.with_zero.defs", "algebra.order.ring.lemmas", "algebra.ring.defs", "order.min_max", "tactic.nontriviality", "data.pi.algebra", "algebra.gr...
[ "lt_of_mul_lt_mul_left", "neg_mul" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
lt_of_mul_lt_mul_of_nonpos_right (h : a * c < b * c) (hc : c ≤ 0) : b < a
lt_of_mul_lt_mul_right (by rwa [mul_neg, mul_neg, neg_lt_neg_iff]) $ neg_nonneg.2 hc
lemma
lt_of_mul_lt_mul_of_nonpos_right
algebra.order.ring
src/algebra/order/ring/defs.lean
[ "algebra.order.group.defs", "algebra.order.monoid.cancel.defs", "algebra.order.monoid.canonical.defs", "algebra.order.monoid.nat_cast", "algebra.order.monoid.with_zero.defs", "algebra.order.ring.lemmas", "algebra.ring.defs", "order.min_max", "tactic.nontriviality", "data.pi.algebra", "algebra.gr...
[ "lt_of_mul_lt_mul_right", "mul_neg" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
cmp_mul_neg_left {a : α} (ha : a < 0) (b c : α) : cmp (a * b) (a * c) = cmp c b
(strict_anti_mul_left ha).cmp_map_eq b c
lemma
cmp_mul_neg_left
algebra.order.ring
src/algebra/order/ring/defs.lean
[ "algebra.order.group.defs", "algebra.order.monoid.cancel.defs", "algebra.order.monoid.canonical.defs", "algebra.order.monoid.nat_cast", "algebra.order.monoid.with_zero.defs", "algebra.order.ring.lemmas", "algebra.ring.defs", "order.min_max", "tactic.nontriviality", "data.pi.algebra", "algebra.gr...
[ "strict_anti_mul_left" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
cmp_mul_neg_right {a : α} (ha : a < 0) (b c : α) : cmp (b * a) (c * a) = cmp c b
(strict_anti_mul_right ha).cmp_map_eq b c
lemma
cmp_mul_neg_right
algebra.order.ring
src/algebra/order/ring/defs.lean
[ "algebra.order.group.defs", "algebra.order.monoid.cancel.defs", "algebra.order.monoid.canonical.defs", "algebra.order.monoid.nat_cast", "algebra.order.monoid.with_zero.defs", "algebra.order.ring.lemmas", "algebra.ring.defs", "order.min_max", "tactic.nontriviality", "data.pi.algebra", "algebra.gr...
[ "strict_anti_mul_right" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
sub_one_lt (a : α) : a - 1 < a
sub_lt_iff_lt_add.2 (lt_add_one a)
lemma
sub_one_lt
algebra.order.ring
src/algebra/order/ring/defs.lean
[ "algebra.order.group.defs", "algebra.order.monoid.cancel.defs", "algebra.order.monoid.canonical.defs", "algebra.order.monoid.nat_cast", "algebra.order.monoid.with_zero.defs", "algebra.order.ring.lemmas", "algebra.ring.defs", "order.min_max", "tactic.nontriviality", "data.pi.algebra", "algebra.gr...
[ "lt_add_one" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
mul_self_pos {a : α} : 0 < a * a ↔ a ≠ 0
begin split, { rintro h rfl, rw mul_zero at h, exact h.false }, { intro h, cases h.lt_or_lt with h h, exacts [mul_pos_of_neg_of_neg h h, mul_pos h h] } end
lemma
mul_self_pos
algebra.order.ring
src/algebra/order/ring/defs.lean
[ "algebra.order.group.defs", "algebra.order.monoid.cancel.defs", "algebra.order.monoid.canonical.defs", "algebra.order.monoid.nat_cast", "algebra.order.monoid.with_zero.defs", "algebra.order.ring.lemmas", "algebra.ring.defs", "order.min_max", "tactic.nontriviality", "data.pi.algebra", "algebra.gr...
[ "mul_pos_of_neg_of_neg", "mul_zero" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
mul_self_le_mul_self_of_le_of_neg_le {x y : α} (h₁ : x ≤ y) (h₂ : -x ≤ y) : x * x ≤ y * y
(le_total 0 x).elim (λ h, mul_le_mul h₁ h₁ h (h.trans h₁)) (λ h, le_of_eq_of_le (neg_mul_neg x x).symm (mul_le_mul h₂ h₂ (neg_nonneg.mpr h) ((neg_nonneg.mpr h).trans h₂)))
lemma
mul_self_le_mul_self_of_le_of_neg_le
algebra.order.ring
src/algebra/order/ring/defs.lean
[ "algebra.order.group.defs", "algebra.order.monoid.cancel.defs", "algebra.order.monoid.canonical.defs", "algebra.order.monoid.nat_cast", "algebra.order.monoid.with_zero.defs", "algebra.order.ring.lemmas", "algebra.ring.defs", "order.min_max", "tactic.nontriviality", "data.pi.algebra", "algebra.gr...
[ "le_of_eq_of_le", "mul_le_mul", "neg_mul_neg" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
nonneg_of_mul_nonpos_left {a b : α} (h : a * b ≤ 0) (hb : b < 0) : 0 ≤ a
le_of_not_gt (λ ha, absurd h (mul_pos_of_neg_of_neg ha hb).not_le)
lemma
nonneg_of_mul_nonpos_left
algebra.order.ring
src/algebra/order/ring/defs.lean
[ "algebra.order.group.defs", "algebra.order.monoid.cancel.defs", "algebra.order.monoid.canonical.defs", "algebra.order.monoid.nat_cast", "algebra.order.monoid.with_zero.defs", "algebra.order.ring.lemmas", "algebra.ring.defs", "order.min_max", "tactic.nontriviality", "data.pi.algebra", "algebra.gr...
[ "mul_pos_of_neg_of_neg" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
nonneg_of_mul_nonpos_right {a b : α} (h : a * b ≤ 0) (ha : a < 0) : 0 ≤ b
le_of_not_gt (λ hb, absurd h (mul_pos_of_neg_of_neg ha hb).not_le)
lemma
nonneg_of_mul_nonpos_right
algebra.order.ring
src/algebra/order/ring/defs.lean
[ "algebra.order.group.defs", "algebra.order.monoid.cancel.defs", "algebra.order.monoid.canonical.defs", "algebra.order.monoid.nat_cast", "algebra.order.monoid.with_zero.defs", "algebra.order.ring.lemmas", "algebra.ring.defs", "order.min_max", "tactic.nontriviality", "data.pi.algebra", "algebra.gr...
[ "mul_pos_of_neg_of_neg" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
pos_of_mul_neg_left {a b : α} (h : a * b < 0) (hb : b ≤ 0) : 0 < a
lt_of_not_ge (λ ha, absurd h (mul_nonneg_of_nonpos_of_nonpos ha hb).not_lt)
lemma
pos_of_mul_neg_left
algebra.order.ring
src/algebra/order/ring/defs.lean
[ "algebra.order.group.defs", "algebra.order.monoid.cancel.defs", "algebra.order.monoid.canonical.defs", "algebra.order.monoid.nat_cast", "algebra.order.monoid.with_zero.defs", "algebra.order.ring.lemmas", "algebra.ring.defs", "order.min_max", "tactic.nontriviality", "data.pi.algebra", "algebra.gr...
[ "mul_nonneg_of_nonpos_of_nonpos" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
pos_of_mul_neg_right {a b : α} (h : a * b < 0) (ha : a ≤ 0) : 0 < b
lt_of_not_ge (λ hb, absurd h (mul_nonneg_of_nonpos_of_nonpos ha hb).not_lt)
lemma
pos_of_mul_neg_right
algebra.order.ring
src/algebra/order/ring/defs.lean
[ "algebra.order.group.defs", "algebra.order.monoid.cancel.defs", "algebra.order.monoid.canonical.defs", "algebra.order.monoid.nat_cast", "algebra.order.monoid.with_zero.defs", "algebra.order.ring.lemmas", "algebra.ring.defs", "order.min_max", "tactic.nontriviality", "data.pi.algebra", "algebra.gr...
[ "mul_nonneg_of_nonpos_of_nonpos" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
neg_iff_pos_of_mul_neg (hab : a * b < 0) : a < 0 ↔ 0 < b
⟨pos_of_mul_neg_right hab ∘ le_of_lt, neg_of_mul_neg_left hab ∘ le_of_lt⟩
lemma
neg_iff_pos_of_mul_neg
algebra.order.ring
src/algebra/order/ring/defs.lean
[ "algebra.order.group.defs", "algebra.order.monoid.cancel.defs", "algebra.order.monoid.canonical.defs", "algebra.order.monoid.nat_cast", "algebra.order.monoid.with_zero.defs", "algebra.order.ring.lemmas", "algebra.ring.defs", "order.min_max", "tactic.nontriviality", "data.pi.algebra", "algebra.gr...
[ "neg_of_mul_neg_left" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
pos_iff_neg_of_mul_neg (hab : a * b < 0) : 0 < a ↔ b < 0
⟨neg_of_mul_neg_right hab ∘ le_of_lt, pos_of_mul_neg_left hab ∘ le_of_lt⟩
lemma
pos_iff_neg_of_mul_neg
algebra.order.ring
src/algebra/order/ring/defs.lean
[ "algebra.order.group.defs", "algebra.order.monoid.cancel.defs", "algebra.order.monoid.canonical.defs", "algebra.order.monoid.nat_cast", "algebra.order.monoid.with_zero.defs", "algebra.order.ring.lemmas", "algebra.ring.defs", "order.min_max", "tactic.nontriviality", "data.pi.algebra", "algebra.gr...
[ "pos_of_mul_neg_left" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
mul_self_add_mul_self_eq_zero {x y : α} : x * x + y * y = 0 ↔ x = 0 ∧ y = 0
by rw [add_eq_zero_iff', mul_self_eq_zero, mul_self_eq_zero]; apply mul_self_nonneg
lemma
mul_self_add_mul_self_eq_zero
algebra.order.ring
src/algebra/order/ring/defs.lean
[ "algebra.order.group.defs", "algebra.order.monoid.cancel.defs", "algebra.order.monoid.canonical.defs", "algebra.order.monoid.nat_cast", "algebra.order.monoid.with_zero.defs", "algebra.order.ring.lemmas", "algebra.ring.defs", "order.min_max", "tactic.nontriviality", "data.pi.algebra", "algebra.gr...
[ "mul_self_eq_zero", "mul_self_nonneg" ]
The sum of two squares is zero iff both elements are zero.
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
eq_zero_of_mul_self_add_mul_self_eq_zero (h : a * a + b * b = 0) : a = 0
(mul_self_add_mul_self_eq_zero.mp h).left
lemma
eq_zero_of_mul_self_add_mul_self_eq_zero
algebra.order.ring
src/algebra/order/ring/defs.lean
[ "algebra.order.group.defs", "algebra.order.monoid.cancel.defs", "algebra.order.monoid.canonical.defs", "algebra.order.monoid.nat_cast", "algebra.order.monoid.with_zero.defs", "algebra.order.ring.lemmas", "algebra.ring.defs", "order.min_max", "tactic.nontriviality", "data.pi.algebra", "algebra.gr...
[]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
linear_ordered_comm_ring.to_strict_ordered_comm_ring [d : linear_ordered_comm_ring α] : strict_ordered_comm_ring α
{ ..d }
instance
linear_ordered_comm_ring.to_strict_ordered_comm_ring
algebra.order.ring
src/algebra/order/ring/defs.lean
[ "algebra.order.group.defs", "algebra.order.monoid.cancel.defs", "algebra.order.monoid.canonical.defs", "algebra.order.monoid.nat_cast", "algebra.order.monoid.with_zero.defs", "algebra.order.ring.lemmas", "algebra.ring.defs", "order.min_max", "tactic.nontriviality", "data.pi.algebra", "algebra.gr...
[ "linear_ordered_comm_ring", "strict_ordered_comm_ring" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
linear_ordered_comm_ring.to_linear_ordered_comm_semiring [d : linear_ordered_comm_ring α] : linear_ordered_comm_semiring α
{ .. d, ..linear_ordered_ring.to_linear_ordered_semiring }
instance
linear_ordered_comm_ring.to_linear_ordered_comm_semiring
algebra.order.ring
src/algebra/order/ring/defs.lean
[ "algebra.order.group.defs", "algebra.order.monoid.cancel.defs", "algebra.order.monoid.canonical.defs", "algebra.order.monoid.nat_cast", "algebra.order.monoid.with_zero.defs", "algebra.order.ring.lemmas", "algebra.ring.defs", "order.min_max", "tactic.nontriviality", "data.pi.algebra", "algebra.gr...
[ "linear_ordered_comm_ring", "linear_ordered_comm_semiring", "linear_ordered_ring.to_linear_ordered_semiring" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
max_mul_mul_le_max_mul_max (b c : α) (ha : 0 ≤ a) (hd: 0 ≤ d) : max (a * b) (d * c) ≤ max a c * max d b
have ba : b * a ≤ max d b * max c a, from mul_le_mul (le_max_right d b) (le_max_right c a) ha (le_trans hd (le_max_left d b)), have cd : c * d ≤ max a c * max b d, from mul_le_mul (le_max_right a c) (le_max_right b d) hd (le_trans ha (le_max_left a c)), max_le (by simpa [mul_comm, max_comm] using ba) (by simpa ...
lemma
max_mul_mul_le_max_mul_max
algebra.order.ring
src/algebra/order/ring/defs.lean
[ "algebra.order.group.defs", "algebra.order.monoid.cancel.defs", "algebra.order.monoid.canonical.defs", "algebra.order.monoid.nat_cast", "algebra.order.monoid.with_zero.defs", "algebra.order.ring.lemmas", "algebra.ring.defs", "order.min_max", "tactic.nontriviality", "data.pi.algebra", "algebra.gr...
[ "mul_comm", "mul_le_mul" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
ordered_semiring [ordered_semiring α] [has_zero β] [has_one β] [has_add β] [has_mul β] [has_pow β ℕ] [has_smul ℕ β] [has_nat_cast β] (f : β → α) (hf : injective f) (zero : f 0 = 0) (one : f 1 = 1) (add : ∀ x y, f (x + y) = f x + f y) (mul : ∀ x y, f (x * y) = f x * f y) (nsmul : ∀ x (n : ℕ), f (n • x) = n • f x) ...
{ zero_le_one := show f 0 ≤ f 1, by simp only [zero, one, zero_le_one], mul_le_mul_of_nonneg_left := λ a b c h hc, show f (c * a) ≤ f (c * b), by { rw [mul, mul], refine mul_le_mul_of_nonneg_left h _, rwa ←zero }, mul_le_mul_of_nonneg_right := λ a b c h hc, show f (a * c) ≤ f (b * c), by { rw [mul, mul], re...
def
function.injective.ordered_semiring
algebra.order.ring
src/algebra/order/ring/inj_surj.lean
[ "algebra.order.ring.defs", "algebra.order.monoid.cancel.basic", "algebra.ring.inj_surj" ]
[ "has_nat_cast", "has_smul", "mul_le_mul_of_nonneg_left", "mul_le_mul_of_nonneg_right", "ordered_semiring", "zero_le_one" ]
Pullback an `ordered_semiring` under an injective map.
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
ordered_comm_semiring [ordered_comm_semiring α] [has_zero β] [has_one β] [has_add β] [has_mul β] [has_pow β ℕ] [has_smul ℕ β] [has_nat_cast β] (f : β → α) (hf : injective f) (zero : f 0 = 0) (one : f 1 = 1) (add : ∀ x y, f (x + y) = f x + f y) (mul : ∀ x y, f (x * y) = f x * f y) (nsmul : ∀ x (n : ℕ), f (n • x) =...
{ ..hf.comm_semiring f zero one add mul nsmul npow nat_cast, ..hf.ordered_semiring f zero one add mul nsmul npow nat_cast }
def
function.injective.ordered_comm_semiring
algebra.order.ring
src/algebra/order/ring/inj_surj.lean
[ "algebra.order.ring.defs", "algebra.order.monoid.cancel.basic", "algebra.ring.inj_surj" ]
[ "has_nat_cast", "has_smul", "ordered_comm_semiring" ]
Pullback an `ordered_comm_semiring` under an injective map.
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
ordered_ring [ordered_ring α] [has_zero β] [has_one β] [has_add β] [has_mul β] [has_neg β] [has_sub β] [has_smul ℕ β] [has_smul ℤ β] [has_pow β ℕ] [has_nat_cast β] [has_int_cast β] (f : β → α) (hf : injective f) (zero : f 0 = 0) (one : f 1 = 1) (add : ∀ x y, f (x + y) = f x + f y) (mul : ∀ x y, f (x * y) = f x * ...
{ mul_nonneg := λ a b ha hb, show f 0 ≤ f (a * b), by { rw [zero, mul], apply mul_nonneg; rwa ← zero }, ..hf.ordered_semiring f zero one add mul nsmul npow nat_cast, ..hf.ring f zero one add mul neg sub nsmul zsmul npow nat_cast int_cast }
def
function.injective.ordered_ring
algebra.order.ring
src/algebra/order/ring/inj_surj.lean
[ "algebra.order.ring.defs", "algebra.order.monoid.cancel.basic", "algebra.ring.inj_surj" ]
[ "has_int_cast", "has_nat_cast", "has_smul", "ordered_ring" ]
Pullback an `ordered_ring` under an injective map.
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
ordered_comm_ring [ordered_comm_ring α] [has_zero β] [has_one β] [has_add β] [has_mul β] [has_neg β] [has_sub β] [has_pow β ℕ] [has_smul ℕ β] [has_smul ℤ β] [has_nat_cast β] [has_int_cast β] (f : β → α) (hf : injective f) (zero : f 0 = 0) (one : f 1 = 1) (add : ∀ x y, f (x + y) = f x + f y) (mul : ∀ x y, f (x * y...
{ ..hf.ordered_ring f zero one add mul neg sub nsmul zsmul npow nat_cast int_cast, ..hf.comm_ring f zero one add mul neg sub nsmul zsmul npow nat_cast int_cast }
def
function.injective.ordered_comm_ring
algebra.order.ring
src/algebra/order/ring/inj_surj.lean
[ "algebra.order.ring.defs", "algebra.order.monoid.cancel.basic", "algebra.ring.inj_surj" ]
[ "has_int_cast", "has_nat_cast", "has_smul", "ordered_comm_ring" ]
Pullback an `ordered_comm_ring` under an injective map.
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
strict_ordered_semiring [strict_ordered_semiring α] [has_zero β] [has_one β] [has_add β] [has_mul β] [has_pow β ℕ] [has_smul ℕ β] [has_nat_cast β] (f : β → α) (hf : injective f) (zero : f 0 = 0) (one : f 1 = 1) (add : ∀ x y, f (x + y) = f x + f y) (mul : ∀ x y, f (x * y) = f x * f y) (nsmul : ∀ x (n : ℕ), f (n • ...
{ mul_lt_mul_of_pos_left := λ a b c h hc, show f (c * a) < f (c * b), by simpa only [mul, zero] using mul_lt_mul_of_pos_left ‹f a < f b› (by rwa ←zero), mul_lt_mul_of_pos_right := λ a b c h hc, show f (a * c) < f (b * c), by simpa only [mul, zero] using mul_lt_mul_of_pos_right ‹f a < f b› (by rwa ←zero), .....
def
function.injective.strict_ordered_semiring
algebra.order.ring
src/algebra/order/ring/inj_surj.lean
[ "algebra.order.ring.defs", "algebra.order.monoid.cancel.basic", "algebra.ring.inj_surj" ]
[ "has_nat_cast", "has_smul", "mul_lt_mul_of_pos_left", "mul_lt_mul_of_pos_right", "pullback_nonzero", "strict_ordered_semiring" ]
Pullback a `strict_ordered_semiring` under an injective map.
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
strict_ordered_comm_semiring [strict_ordered_comm_semiring α] [has_zero β] [has_one β] [has_add β] [has_mul β] [has_pow β ℕ] [has_smul ℕ β] [has_nat_cast β] (f : β → α) (hf : injective f) (zero : f 0 = 0) (one : f 1 = 1) (add : ∀ x y, f (x + y) = f x + f y) (mul : ∀ x y, f (x * y) = f x * f y) (nsmul : ∀ x (n : ℕ...
{ ..hf.comm_semiring f zero one add mul nsmul npow nat_cast, ..hf.strict_ordered_semiring f zero one add mul nsmul npow nat_cast }
def
function.injective.strict_ordered_comm_semiring
algebra.order.ring
src/algebra/order/ring/inj_surj.lean
[ "algebra.order.ring.defs", "algebra.order.monoid.cancel.basic", "algebra.ring.inj_surj" ]
[ "has_nat_cast", "has_smul", "strict_ordered_comm_semiring" ]
Pullback a `strict_ordered_comm_semiring` under an injective map.
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
strict_ordered_ring [strict_ordered_ring α] [has_zero β] [has_one β] [has_add β] [has_mul β] [has_neg β] [has_sub β] [has_smul ℕ β] [has_smul ℤ β] [has_pow β ℕ] [has_nat_cast β] [has_int_cast β] (f : β → α) (hf : injective f) (zero : f 0 = 0) (one : f 1 = 1) (add : ∀ x y, f (x + y) = f x + f y) (mul : ∀ x y, f (x...
{ mul_pos := λ a b a0 b0, show f 0 < f (a * b), by { rw [zero, mul], apply mul_pos; rwa ← zero }, ..hf.strict_ordered_semiring f zero one add mul nsmul npow nat_cast, ..hf.ring f zero one add mul neg sub nsmul zsmul npow nat_cast int_cast }
def
function.injective.strict_ordered_ring
algebra.order.ring
src/algebra/order/ring/inj_surj.lean
[ "algebra.order.ring.defs", "algebra.order.monoid.cancel.basic", "algebra.ring.inj_surj" ]
[ "has_int_cast", "has_nat_cast", "has_smul", "strict_ordered_ring" ]
Pullback a `strict_ordered_ring` under an injective map.
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
strict_ordered_comm_ring [strict_ordered_comm_ring α] [has_zero β] [has_one β] [has_add β] [has_mul β] [has_neg β] [has_sub β] [has_pow β ℕ] [has_smul ℕ β] [has_smul ℤ β] [has_nat_cast β] [has_int_cast β] (f : β → α) (hf : injective f) (zero : f 0 = 0) (one : f 1 = 1) (add : ∀ x y, f (x + y) = f x + f y) (mul : ∀...
{ ..hf.strict_ordered_ring f zero one add mul neg sub nsmul zsmul npow nat_cast int_cast, ..hf.comm_ring f zero one add mul neg sub nsmul zsmul npow nat_cast int_cast }
def
function.injective.strict_ordered_comm_ring
algebra.order.ring
src/algebra/order/ring/inj_surj.lean
[ "algebra.order.ring.defs", "algebra.order.monoid.cancel.basic", "algebra.ring.inj_surj" ]
[ "has_int_cast", "has_nat_cast", "has_smul", "strict_ordered_comm_ring" ]
Pullback a `strict_ordered_comm_ring` under an injective map.
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
linear_ordered_semiring [linear_ordered_semiring α] [has_zero β] [has_one β] [has_add β] [has_mul β] [has_pow β ℕ] [has_smul ℕ β] [has_nat_cast β] [has_sup β] [has_inf β] (f : β → α) (hf : injective f) (zero : f 0 = 0) (one : f 1 = 1) (add : ∀ x y, f (x + y) = f x + f y) (mul : ∀ x y, f (x * y) = f x * f y) (ns...
{ .. linear_order.lift f hf hsup hinf, .. hf.strict_ordered_semiring f zero one add mul nsmul npow nat_cast }
def
function.injective.linear_ordered_semiring
algebra.order.ring
src/algebra/order/ring/inj_surj.lean
[ "algebra.order.ring.defs", "algebra.order.monoid.cancel.basic", "algebra.ring.inj_surj" ]
[ "has_inf", "has_nat_cast", "has_smul", "has_sup", "linear_order.lift", "linear_ordered_semiring" ]
Pullback a `linear_ordered_semiring` under an injective map.
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
linear_ordered_comm_semiring [linear_ordered_comm_semiring α] [has_zero β] [has_one β] [has_add β] [has_mul β] [has_pow β ℕ] [has_smul ℕ β] [has_nat_cast β] [has_sup β] [has_inf β] (f : β → α) (hf : injective f) (zero : f 0 = 0) (one : f 1 = 1) (add : ∀ x y, f (x + y) = f x + f y) (mul : ∀ x y, f (x * y) = f x * ...
{ ..hf.linear_ordered_semiring f zero one add mul nsmul npow nat_cast hsup hinf, ..hf.strict_ordered_comm_semiring f zero one add mul nsmul npow nat_cast }
def
function.injective.linear_ordered_comm_semiring
algebra.order.ring
src/algebra/order/ring/inj_surj.lean
[ "algebra.order.ring.defs", "algebra.order.monoid.cancel.basic", "algebra.ring.inj_surj" ]
[ "has_inf", "has_nat_cast", "has_smul", "has_sup", "linear_ordered_comm_semiring" ]
Pullback a `linear_ordered_semiring` under an injective map.
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
linear_ordered_ring [linear_ordered_ring α] [has_zero β] [has_one β] [has_add β] [has_mul β] [has_neg β] [has_sub β] [has_smul ℕ β] [has_smul ℤ β] [has_pow β ℕ] [has_nat_cast β] [has_int_cast β] [has_sup β] [has_inf β] (f : β → α) (hf : injective f) (zero : f 0 = 0) (one : f 1 = 1) (add : ∀ x y, f (x + y) = f x +...
{ .. linear_order.lift f hf hsup hinf, .. hf.strict_ordered_ring f zero one add mul neg sub nsmul zsmul npow nat_cast int_cast }
def
function.injective.linear_ordered_ring
algebra.order.ring
src/algebra/order/ring/inj_surj.lean
[ "algebra.order.ring.defs", "algebra.order.monoid.cancel.basic", "algebra.ring.inj_surj" ]
[ "has_inf", "has_int_cast", "has_nat_cast", "has_smul", "has_sup", "linear_order.lift", "linear_ordered_ring" ]
Pullback a `linear_ordered_ring` under an injective map.
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
linear_ordered_comm_ring [linear_ordered_comm_ring α] [has_zero β] [has_one β] [has_add β] [has_mul β] [has_neg β] [has_sub β] [has_pow β ℕ] [has_smul ℕ β] [has_smul ℤ β] [has_nat_cast β] [has_int_cast β] [has_sup β] [has_inf β] (f : β → α) (hf : injective f) (zero : f 0 = 0) (one : f 1 = 1) (add : ∀ x y, f (x +...
{ .. linear_order.lift f hf hsup hinf, .. hf.strict_ordered_comm_ring f zero one add mul neg sub nsmul zsmul npow nat_cast int_cast }
def
function.injective.linear_ordered_comm_ring
algebra.order.ring
src/algebra/order/ring/inj_surj.lean
[ "algebra.order.ring.defs", "algebra.order.monoid.cancel.basic", "algebra.ring.inj_surj" ]
[ "has_inf", "has_int_cast", "has_nat_cast", "has_smul", "has_sup", "linear_order.lift", "linear_ordered_comm_ring" ]
Pullback a `linear_ordered_comm_ring` under an injective map.
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
pos_mul_mono : Prop
covariant_class α≥0 α (λ x y, x * y) (≤)
abbreviation
pos_mul_mono
algebra.order.ring
src/algebra/order/ring/lemmas.lean
[ "algebra.covariant_and_contravariant", "algebra.group_with_zero.defs" ]
[ "covariant_class" ]
`pos_mul_mono α` is an abbreviation for `covariant_class α≥0 α (λ x y, x * y) (≤)`, expressing that multiplication by nonnegative elements on the left is monotone.
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
mul_pos_mono : Prop
covariant_class α≥0 α (λ x y, y * x) (≤)
abbreviation
mul_pos_mono
algebra.order.ring
src/algebra/order/ring/lemmas.lean
[ "algebra.covariant_and_contravariant", "algebra.group_with_zero.defs" ]
[ "covariant_class" ]
`mul_pos_mono α` is an abbreviation for `covariant_class α≥0 α (λ x y, y * x) (≤)`, expressing that multiplication by nonnegative elements on the right is monotone.
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
pos_mul_strict_mono : Prop
covariant_class α>0 α (λ x y, x * y) (<)
abbreviation
pos_mul_strict_mono
algebra.order.ring
src/algebra/order/ring/lemmas.lean
[ "algebra.covariant_and_contravariant", "algebra.group_with_zero.defs" ]
[ "covariant_class" ]
`pos_mul_strict_mono α` is an abbreviation for `covariant_class α>0 α (λ x y, x * y) (<)`, expressing that multiplication by positive elements on the left is strictly monotone.
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
mul_pos_strict_mono : Prop
covariant_class α>0 α (λ x y, y * x) (<)
abbreviation
mul_pos_strict_mono
algebra.order.ring
src/algebra/order/ring/lemmas.lean
[ "algebra.covariant_and_contravariant", "algebra.group_with_zero.defs" ]
[ "covariant_class" ]
`mul_pos_strict_mono α` is an abbreviation for `covariant_class α>0 α (λ x y, y * x) (<)`, expressing that multiplication by positive elements on the right is strictly monotone.
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
pos_mul_reflect_lt : Prop
contravariant_class α≥0 α (λ x y, x * y) (<)
abbreviation
pos_mul_reflect_lt
algebra.order.ring
src/algebra/order/ring/lemmas.lean
[ "algebra.covariant_and_contravariant", "algebra.group_with_zero.defs" ]
[ "contravariant_class" ]
`pos_mul_reflect_lt α` is an abbreviation for `contravariant_class α≥0 α (λ x y, x * y) (<)`, expressing that multiplication by nonnegative elements on the left is strictly reverse monotone.
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
mul_pos_reflect_lt : Prop
contravariant_class α≥0 α (λ x y, y * x) (<)
abbreviation
mul_pos_reflect_lt
algebra.order.ring
src/algebra/order/ring/lemmas.lean
[ "algebra.covariant_and_contravariant", "algebra.group_with_zero.defs" ]
[ "contravariant_class" ]
`mul_pos_reflect_lt α` is an abbreviation for `contravariant_class α≥0 α (λ x y, y * x) (<)`, expressing that multiplication by nonnegative elements on the right is strictly reverse monotone.
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
pos_mul_mono_rev : Prop
contravariant_class α>0 α (λ x y, x * y) (≤)
abbreviation
pos_mul_mono_rev
algebra.order.ring
src/algebra/order/ring/lemmas.lean
[ "algebra.covariant_and_contravariant", "algebra.group_with_zero.defs" ]
[ "contravariant_class" ]
`pos_mul_mono_rev α` is an abbreviation for `contravariant_class α>0 α (λ x y, x * y) (≤)`, expressing that multiplication by positive elements on the left is reverse monotone.
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
mul_pos_mono_rev : Prop
contravariant_class α>0 α (λ x y, y * x) (≤)
abbreviation
mul_pos_mono_rev
algebra.order.ring
src/algebra/order/ring/lemmas.lean
[ "algebra.covariant_and_contravariant", "algebra.group_with_zero.defs" ]
[ "contravariant_class" ]
`mul_pos_mono_rev α` is an abbreviation for `contravariant_class α>0 α (λ x y, y * x) (≤)`, expressing that multiplication by positive elements on the right is reverse monotone.
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
pos_mul_mono.to_covariant_class_pos_mul_le [pos_mul_mono α] : covariant_class α>0 α (λ x y, x * y) (≤)
⟨λ a b c bc, @covariant_class.elim α≥0 α (λ x y, x * y) (≤) _ ⟨_, a.2.le⟩ _ _ bc⟩
instance
pos_mul_mono.to_covariant_class_pos_mul_le
algebra.order.ring
src/algebra/order/ring/lemmas.lean
[ "algebra.covariant_and_contravariant", "algebra.group_with_zero.defs" ]
[ "covariant_class", "pos_mul_mono" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
mul_pos_mono.to_covariant_class_pos_mul_le [mul_pos_mono α] : covariant_class α>0 α (λ x y, y * x) (≤)
⟨λ a b c bc, @covariant_class.elim α≥0 α (λ x y, y * x) (≤) _ ⟨_, a.2.le⟩ _ _ bc⟩
instance
mul_pos_mono.to_covariant_class_pos_mul_le
algebra.order.ring
src/algebra/order/ring/lemmas.lean
[ "algebra.covariant_and_contravariant", "algebra.group_with_zero.defs" ]
[ "covariant_class", "mul_pos_mono" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
pos_mul_reflect_lt.to_contravariant_class_pos_mul_lt [pos_mul_reflect_lt α] : contravariant_class α>0 α (λ x y, x * y) (<)
⟨λ a b c bc, @contravariant_class.elim α≥0 α (λ x y, x * y) (<) _ ⟨_, a.2.le⟩ _ _ bc⟩
instance
pos_mul_reflect_lt.to_contravariant_class_pos_mul_lt
algebra.order.ring
src/algebra/order/ring/lemmas.lean
[ "algebra.covariant_and_contravariant", "algebra.group_with_zero.defs" ]
[ "contravariant_class", "pos_mul_reflect_lt" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
mul_pos_reflect_lt.to_contravariant_class_pos_mul_lt [mul_pos_reflect_lt α] : contravariant_class α>0 α (λ x y, y * x) (<)
⟨λ a b c bc, @contravariant_class.elim α≥0 α (λ x y, y * x) (<) _ ⟨_, a.2.le⟩ _ _ bc⟩
instance
mul_pos_reflect_lt.to_contravariant_class_pos_mul_lt
algebra.order.ring
src/algebra/order/ring/lemmas.lean
[ "algebra.covariant_and_contravariant", "algebra.group_with_zero.defs" ]
[ "contravariant_class", "mul_pos_reflect_lt" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
mul_le_mul_of_nonneg_left [pos_mul_mono α] (h : b ≤ c) (a0 : 0 ≤ a) : a * b ≤ a * c
@covariant_class.elim α≥0 α (λ x y, x * y) (≤) _ ⟨a, a0⟩ _ _ h
lemma
mul_le_mul_of_nonneg_left
algebra.order.ring
src/algebra/order/ring/lemmas.lean
[ "algebra.covariant_and_contravariant", "algebra.group_with_zero.defs" ]
[ "pos_mul_mono" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
mul_le_mul_of_nonneg_right [mul_pos_mono α] (h : b ≤ c) (a0 : 0 ≤ a) : b * a ≤ c * a
@covariant_class.elim α≥0 α (λ x y, y * x) (≤) _ ⟨a, a0⟩ _ _ h
lemma
mul_le_mul_of_nonneg_right
algebra.order.ring
src/algebra/order/ring/lemmas.lean
[ "algebra.covariant_and_contravariant", "algebra.group_with_zero.defs" ]
[ "mul_pos_mono" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
mul_lt_mul_of_pos_left [pos_mul_strict_mono α] (bc : b < c) (a0 : 0 < a) : a * b < a * c
@covariant_class.elim α>0 α (λ x y, x * y) (<) _ ⟨a, a0⟩ _ _ bc
lemma
mul_lt_mul_of_pos_left
algebra.order.ring
src/algebra/order/ring/lemmas.lean
[ "algebra.covariant_and_contravariant", "algebra.group_with_zero.defs" ]
[ "pos_mul_strict_mono" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
mul_lt_mul_of_pos_right [mul_pos_strict_mono α] (bc : b < c) (a0 : 0 < a) : b * a < c * a
@covariant_class.elim α>0 α (λ x y, y * x) (<) _ ⟨a, a0⟩ _ _ bc
lemma
mul_lt_mul_of_pos_right
algebra.order.ring
src/algebra/order/ring/lemmas.lean
[ "algebra.covariant_and_contravariant", "algebra.group_with_zero.defs" ]
[ "mul_pos_strict_mono" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
lt_of_mul_lt_mul_left [pos_mul_reflect_lt α] (h : a * b < a * c) (a0 : 0 ≤ a) : b < c
@contravariant_class.elim α≥0 α (λ x y, x * y) (<) _ ⟨a, a0⟩ _ _ h
lemma
lt_of_mul_lt_mul_left
algebra.order.ring
src/algebra/order/ring/lemmas.lean
[ "algebra.covariant_and_contravariant", "algebra.group_with_zero.defs" ]
[ "pos_mul_reflect_lt" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
lt_of_mul_lt_mul_right [mul_pos_reflect_lt α] (h : b * a < c * a) (a0 : 0 ≤ a) : b < c
@contravariant_class.elim α≥0 α (λ x y, y * x) (<) _ ⟨a, a0⟩ _ _ h
lemma
lt_of_mul_lt_mul_right
algebra.order.ring
src/algebra/order/ring/lemmas.lean
[ "algebra.covariant_and_contravariant", "algebra.group_with_zero.defs" ]
[ "mul_pos_reflect_lt" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
le_of_mul_le_mul_left [pos_mul_mono_rev α] (bc : a * b ≤ a * c) (a0 : 0 < a) : b ≤ c
@contravariant_class.elim α>0 α (λ x y, x * y) (≤) _ ⟨a, a0⟩ _ _ bc
lemma
le_of_mul_le_mul_left
algebra.order.ring
src/algebra/order/ring/lemmas.lean
[ "algebra.covariant_and_contravariant", "algebra.group_with_zero.defs" ]
[ "pos_mul_mono_rev" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
le_of_mul_le_mul_right [mul_pos_mono_rev α] (bc : b * a ≤ c * a) (a0 : 0 < a) : b ≤ c
@contravariant_class.elim α>0 α (λ x y, y * x) (≤) _ ⟨a, a0⟩ _ _ bc
lemma
le_of_mul_le_mul_right
algebra.order.ring
src/algebra/order/ring/lemmas.lean
[ "algebra.covariant_and_contravariant", "algebra.group_with_zero.defs" ]
[ "mul_pos_mono_rev" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
mul_lt_mul_left [pos_mul_strict_mono α] [pos_mul_reflect_lt α] (a0 : 0 < a) : a * b < a * c ↔ b < c
@rel_iff_cov α>0 α (λ x y, x * y) (<) _ _ ⟨a, a0⟩ _ _
lemma
mul_lt_mul_left
algebra.order.ring
src/algebra/order/ring/lemmas.lean
[ "algebra.covariant_and_contravariant", "algebra.group_with_zero.defs" ]
[ "pos_mul_reflect_lt", "pos_mul_strict_mono", "rel_iff_cov" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
mul_lt_mul_right [mul_pos_strict_mono α] [mul_pos_reflect_lt α] (a0 : 0 < a) : b * a < c * a ↔ b < c
@rel_iff_cov α>0 α (λ x y, y * x) (<) _ _ ⟨a, a0⟩ _ _
lemma
mul_lt_mul_right
algebra.order.ring
src/algebra/order/ring/lemmas.lean
[ "algebra.covariant_and_contravariant", "algebra.group_with_zero.defs" ]
[ "mul_pos_reflect_lt", "mul_pos_strict_mono", "rel_iff_cov" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
mul_le_mul_left [pos_mul_mono α] [pos_mul_mono_rev α] (a0 : 0 < a) : a * b ≤ a * c ↔ b ≤ c
@rel_iff_cov α>0 α (λ x y, x * y) (≤) _ _ ⟨a, a0⟩ _ _
lemma
mul_le_mul_left
algebra.order.ring
src/algebra/order/ring/lemmas.lean
[ "algebra.covariant_and_contravariant", "algebra.group_with_zero.defs" ]
[ "pos_mul_mono", "pos_mul_mono_rev", "rel_iff_cov" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
mul_le_mul_right [mul_pos_mono α] [mul_pos_mono_rev α] (a0 : 0 < a) : b * a ≤ c * a ↔ b ≤ c
@rel_iff_cov α>0 α (λ x y, y * x) (≤) _ _ ⟨a, a0⟩ _ _
lemma
mul_le_mul_right
algebra.order.ring
src/algebra/order/ring/lemmas.lean
[ "algebra.covariant_and_contravariant", "algebra.group_with_zero.defs" ]
[ "mul_pos_mono", "mul_pos_mono_rev", "rel_iff_cov" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
mul_lt_mul_of_pos_of_nonneg [pos_mul_strict_mono α] [mul_pos_mono α] (h₁ : a ≤ b) (h₂ : c < d) (a0 : 0 < a) (d0 : 0 ≤ d) : a * c < b * d
(mul_lt_mul_of_pos_left h₂ a0).trans_le (mul_le_mul_of_nonneg_right h₁ d0)
lemma
mul_lt_mul_of_pos_of_nonneg
algebra.order.ring
src/algebra/order/ring/lemmas.lean
[ "algebra.covariant_and_contravariant", "algebra.group_with_zero.defs" ]
[ "mul_le_mul_of_nonneg_right", "mul_lt_mul_of_pos_left", "mul_pos_mono", "pos_mul_strict_mono" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
mul_lt_mul_of_le_of_le' [pos_mul_strict_mono α] [mul_pos_mono α] (h₁ : a ≤ b) (h₂ : c < d) (b0 : 0 < b) (c0 : 0 ≤ c) : a * c < b * d
(mul_le_mul_of_nonneg_right h₁ c0).trans_lt (mul_lt_mul_of_pos_left h₂ b0)
lemma
mul_lt_mul_of_le_of_le'
algebra.order.ring
src/algebra/order/ring/lemmas.lean
[ "algebra.covariant_and_contravariant", "algebra.group_with_zero.defs" ]
[ "mul_le_mul_of_nonneg_right", "mul_lt_mul_of_pos_left", "mul_pos_mono", "pos_mul_strict_mono" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
mul_lt_mul_of_nonneg_of_pos [pos_mul_mono α] [mul_pos_strict_mono α] (h₁ : a < b) (h₂ : c ≤ d) (a0 : 0 ≤ a) (d0 : 0 < d) : a * c < b * d
(mul_le_mul_of_nonneg_left h₂ a0).trans_lt (mul_lt_mul_of_pos_right h₁ d0)
lemma
mul_lt_mul_of_nonneg_of_pos
algebra.order.ring
src/algebra/order/ring/lemmas.lean
[ "algebra.covariant_and_contravariant", "algebra.group_with_zero.defs" ]
[ "mul_le_mul_of_nonneg_left", "mul_lt_mul_of_pos_right", "mul_pos_strict_mono", "pos_mul_mono" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
mul_lt_mul_of_le_of_lt' [pos_mul_mono α] [mul_pos_strict_mono α] (h₁ : a < b) (h₂ : c ≤ d) (b0 : 0 ≤ b) (c0 : 0 < c) : a * c < b * d
(mul_lt_mul_of_pos_right h₁ c0).trans_le (mul_le_mul_of_nonneg_left h₂ b0)
lemma
mul_lt_mul_of_le_of_lt'
algebra.order.ring
src/algebra/order/ring/lemmas.lean
[ "algebra.covariant_and_contravariant", "algebra.group_with_zero.defs" ]
[ "mul_le_mul_of_nonneg_left", "mul_lt_mul_of_pos_right", "mul_pos_strict_mono", "pos_mul_mono" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
mul_lt_mul_of_pos_of_pos [pos_mul_strict_mono α] [mul_pos_strict_mono α] (h₁ : a < b) (h₂ : c < d) (a0 : 0 < a) (d0 : 0 < d) : a * c < b * d
(mul_lt_mul_of_pos_left h₂ a0).trans (mul_lt_mul_of_pos_right h₁ d0)
lemma
mul_lt_mul_of_pos_of_pos
algebra.order.ring
src/algebra/order/ring/lemmas.lean
[ "algebra.covariant_and_contravariant", "algebra.group_with_zero.defs" ]
[ "mul_lt_mul_of_pos_left", "mul_lt_mul_of_pos_right", "mul_pos_strict_mono", "pos_mul_strict_mono" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
mul_lt_mul_of_lt_of_lt' [pos_mul_strict_mono α] [mul_pos_strict_mono α] (h₁ : a < b) (h₂ : c < d) (b0 : 0 < b) (c0 : 0 < c) : a * c < b * d
(mul_lt_mul_of_pos_right h₁ c0).trans (mul_lt_mul_of_pos_left h₂ b0)
lemma
mul_lt_mul_of_lt_of_lt'
algebra.order.ring
src/algebra/order/ring/lemmas.lean
[ "algebra.covariant_and_contravariant", "algebra.group_with_zero.defs" ]
[ "mul_lt_mul_of_pos_left", "mul_lt_mul_of_pos_right", "mul_pos_strict_mono", "pos_mul_strict_mono" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
mul_lt_of_mul_lt_of_nonneg_left [pos_mul_mono α] (h : a * b < c) (hdb : d ≤ b) (ha : 0 ≤ a) : a * d < c
(mul_le_mul_of_nonneg_left hdb ha).trans_lt h
lemma
mul_lt_of_mul_lt_of_nonneg_left
algebra.order.ring
src/algebra/order/ring/lemmas.lean
[ "algebra.covariant_and_contravariant", "algebra.group_with_zero.defs" ]
[ "mul_le_mul_of_nonneg_left", "pos_mul_mono" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
lt_mul_of_lt_mul_of_nonneg_left [pos_mul_mono α] (h : a < b * c) (hcd : c ≤ d) (hb : 0 ≤ b) : a < b * d
h.trans_le $ mul_le_mul_of_nonneg_left hcd hb
lemma
lt_mul_of_lt_mul_of_nonneg_left
algebra.order.ring
src/algebra/order/ring/lemmas.lean
[ "algebra.covariant_and_contravariant", "algebra.group_with_zero.defs" ]
[ "mul_le_mul_of_nonneg_left", "pos_mul_mono" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
mul_lt_of_mul_lt_of_nonneg_right [mul_pos_mono α] (h : a * b < c) (hda : d ≤ a) (hb : 0 ≤ b) : d * b < c
(mul_le_mul_of_nonneg_right hda hb).trans_lt h
lemma
mul_lt_of_mul_lt_of_nonneg_right
algebra.order.ring
src/algebra/order/ring/lemmas.lean
[ "algebra.covariant_and_contravariant", "algebra.group_with_zero.defs" ]
[ "mul_le_mul_of_nonneg_right", "mul_pos_mono" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
lt_mul_of_lt_mul_of_nonneg_right [mul_pos_mono α] (h : a < b * c) (hbd : b ≤ d) (hc : 0 ≤ c) : a < d * c
h.trans_le $ mul_le_mul_of_nonneg_right hbd hc
lemma
lt_mul_of_lt_mul_of_nonneg_right
algebra.order.ring
src/algebra/order/ring/lemmas.lean
[ "algebra.covariant_and_contravariant", "algebra.group_with_zero.defs" ]
[ "mul_le_mul_of_nonneg_right", "mul_pos_mono" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
pos_mul_strict_mono.to_pos_mul_mono_rev [pos_mul_strict_mono α] : pos_mul_mono_rev α
⟨λ x a b h, le_of_not_lt $ λ h', h.not_lt $ mul_lt_mul_of_pos_left h' x.prop⟩
instance
pos_mul_strict_mono.to_pos_mul_mono_rev
algebra.order.ring
src/algebra/order/ring/lemmas.lean
[ "algebra.covariant_and_contravariant", "algebra.group_with_zero.defs" ]
[ "mul_lt_mul_of_pos_left", "pos_mul_mono_rev", "pos_mul_strict_mono" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
mul_pos_strict_mono.to_mul_pos_mono_rev [mul_pos_strict_mono α] : mul_pos_mono_rev α
⟨λ x a b h, le_of_not_lt $ λ h', h.not_lt $ mul_lt_mul_of_pos_right h' x.prop⟩
instance
mul_pos_strict_mono.to_mul_pos_mono_rev
algebra.order.ring
src/algebra/order/ring/lemmas.lean
[ "algebra.covariant_and_contravariant", "algebra.group_with_zero.defs" ]
[ "mul_lt_mul_of_pos_right", "mul_pos_mono_rev", "mul_pos_strict_mono" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
pos_mul_mono_rev.to_pos_mul_strict_mono [pos_mul_mono_rev α] : pos_mul_strict_mono α
⟨λ x a b h, lt_of_not_le $ λ h', h.not_le $ le_of_mul_le_mul_of_pos_left h' x.prop⟩
lemma
pos_mul_mono_rev.to_pos_mul_strict_mono
algebra.order.ring
src/algebra/order/ring/lemmas.lean
[ "algebra.covariant_and_contravariant", "algebra.group_with_zero.defs" ]
[ "lt_of_not_le", "pos_mul_mono_rev", "pos_mul_strict_mono" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
mul_pos_mono_rev.to_mul_pos_strict_mono [mul_pos_mono_rev α] : mul_pos_strict_mono α
⟨λ x a b h, lt_of_not_le $ λ h', h.not_le $ le_of_mul_le_mul_of_pos_right h' x.prop⟩
lemma
mul_pos_mono_rev.to_mul_pos_strict_mono
algebra.order.ring
src/algebra/order/ring/lemmas.lean
[ "algebra.covariant_and_contravariant", "algebra.group_with_zero.defs" ]
[ "lt_of_not_le", "mul_pos_mono_rev", "mul_pos_strict_mono" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
pos_mul_strict_mono_iff_pos_mul_mono_rev : pos_mul_strict_mono α ↔ pos_mul_mono_rev α
⟨@pos_mul_strict_mono.to_pos_mul_mono_rev _ _ _ _, @pos_mul_mono_rev.to_pos_mul_strict_mono _ _ _ _⟩
lemma
pos_mul_strict_mono_iff_pos_mul_mono_rev
algebra.order.ring
src/algebra/order/ring/lemmas.lean
[ "algebra.covariant_and_contravariant", "algebra.group_with_zero.defs" ]
[ "pos_mul_mono_rev", "pos_mul_mono_rev.to_pos_mul_strict_mono", "pos_mul_strict_mono", "pos_mul_strict_mono.to_pos_mul_mono_rev" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
mul_pos_strict_mono_iff_mul_pos_mono_rev : mul_pos_strict_mono α ↔ mul_pos_mono_rev α
⟨@mul_pos_strict_mono.to_mul_pos_mono_rev _ _ _ _, @mul_pos_mono_rev.to_mul_pos_strict_mono _ _ _ _⟩
lemma
mul_pos_strict_mono_iff_mul_pos_mono_rev
algebra.order.ring
src/algebra/order/ring/lemmas.lean
[ "algebra.covariant_and_contravariant", "algebra.group_with_zero.defs" ]
[ "mul_pos_mono_rev", "mul_pos_mono_rev.to_mul_pos_strict_mono", "mul_pos_strict_mono", "mul_pos_strict_mono.to_mul_pos_mono_rev" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
pos_mul_reflect_lt.to_pos_mul_mono [pos_mul_reflect_lt α] : pos_mul_mono α
⟨λ x a b h, le_of_not_lt $ λ h', h.not_lt $ lt_of_mul_lt_mul_left h' x.prop⟩
lemma
pos_mul_reflect_lt.to_pos_mul_mono
algebra.order.ring
src/algebra/order/ring/lemmas.lean
[ "algebra.covariant_and_contravariant", "algebra.group_with_zero.defs" ]
[ "lt_of_mul_lt_mul_left", "pos_mul_mono", "pos_mul_reflect_lt" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
mul_pos_reflect_lt.to_mul_pos_mono [mul_pos_reflect_lt α] : mul_pos_mono α
⟨λ x a b h, le_of_not_lt $ λ h', h.not_lt $ lt_of_mul_lt_mul_right h' x.prop⟩
lemma
mul_pos_reflect_lt.to_mul_pos_mono
algebra.order.ring
src/algebra/order/ring/lemmas.lean
[ "algebra.covariant_and_contravariant", "algebra.group_with_zero.defs" ]
[ "lt_of_mul_lt_mul_right", "mul_pos_mono", "mul_pos_reflect_lt" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
pos_mul_mono.to_pos_mul_reflect_lt [pos_mul_mono α] : pos_mul_reflect_lt α
⟨λ x a b h, lt_of_not_le $ λ h', h.not_le $ mul_le_mul_of_nonneg_left h' x.prop⟩
lemma
pos_mul_mono.to_pos_mul_reflect_lt
algebra.order.ring
src/algebra/order/ring/lemmas.lean
[ "algebra.covariant_and_contravariant", "algebra.group_with_zero.defs" ]
[ "lt_of_not_le", "mul_le_mul_of_nonneg_left", "pos_mul_mono", "pos_mul_reflect_lt" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
mul_pos_mono.to_mul_pos_reflect_lt [mul_pos_mono α] : mul_pos_reflect_lt α
⟨λ x a b h, lt_of_not_le $ λ h', h.not_le $ mul_le_mul_of_nonneg_right h' x.prop⟩
lemma
mul_pos_mono.to_mul_pos_reflect_lt
algebra.order.ring
src/algebra/order/ring/lemmas.lean
[ "algebra.covariant_and_contravariant", "algebra.group_with_zero.defs" ]
[ "lt_of_not_le", "mul_le_mul_of_nonneg_right", "mul_pos_mono", "mul_pos_reflect_lt" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
pos_mul_mono_iff_pos_mul_reflect_lt : pos_mul_mono α ↔ pos_mul_reflect_lt α
⟨@pos_mul_mono.to_pos_mul_reflect_lt _ _ _ _, @pos_mul_reflect_lt.to_pos_mul_mono _ _ _ _⟩
lemma
pos_mul_mono_iff_pos_mul_reflect_lt
algebra.order.ring
src/algebra/order/ring/lemmas.lean
[ "algebra.covariant_and_contravariant", "algebra.group_with_zero.defs" ]
[ "pos_mul_mono", "pos_mul_mono.to_pos_mul_reflect_lt", "pos_mul_reflect_lt", "pos_mul_reflect_lt.to_pos_mul_mono" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
mul_pos_mono_iff_mul_pos_reflect_lt : mul_pos_mono α ↔ mul_pos_reflect_lt α
⟨@mul_pos_mono.to_mul_pos_reflect_lt _ _ _ _, @mul_pos_reflect_lt.to_mul_pos_mono _ _ _ _⟩
lemma
mul_pos_mono_iff_mul_pos_reflect_lt
algebra.order.ring
src/algebra/order/ring/lemmas.lean
[ "algebra.covariant_and_contravariant", "algebra.group_with_zero.defs" ]
[ "mul_pos_mono", "mul_pos_mono.to_mul_pos_reflect_lt", "mul_pos_reflect_lt", "mul_pos_reflect_lt.to_mul_pos_mono" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
left.mul_pos [pos_mul_strict_mono α] (ha : 0 < a) (hb : 0 < b) : 0 < a * b
by simpa only [mul_zero] using mul_lt_mul_of_pos_left hb ha
lemma
left.mul_pos
algebra.order.ring
src/algebra/order/ring/lemmas.lean
[ "algebra.covariant_and_contravariant", "algebra.group_with_zero.defs" ]
[ "mul_lt_mul_of_pos_left", "mul_zero", "pos_mul_strict_mono" ]
Assumes left covariance.
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
mul_neg_of_pos_of_neg [pos_mul_strict_mono α] (ha : 0 < a) (hb : b < 0) : a * b < 0
by simpa only [mul_zero] using mul_lt_mul_of_pos_left hb ha
lemma
mul_neg_of_pos_of_neg
algebra.order.ring
src/algebra/order/ring/lemmas.lean
[ "algebra.covariant_and_contravariant", "algebra.group_with_zero.defs" ]
[ "mul_lt_mul_of_pos_left", "mul_zero", "pos_mul_strict_mono" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
zero_lt_mul_left [pos_mul_strict_mono α] [pos_mul_reflect_lt α] (h : 0 < c) : 0 < c * b ↔ 0 < b
by { convert mul_lt_mul_left h, simp }
lemma
zero_lt_mul_left
algebra.order.ring
src/algebra/order/ring/lemmas.lean
[ "algebra.covariant_and_contravariant", "algebra.group_with_zero.defs" ]
[ "mul_lt_mul_left", "pos_mul_reflect_lt", "pos_mul_strict_mono" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
right.mul_pos [mul_pos_strict_mono α] (ha : 0 < a) (hb : 0 < b) : 0 < a * b
by simpa only [zero_mul] using mul_lt_mul_of_pos_right ha hb
lemma
right.mul_pos
algebra.order.ring
src/algebra/order/ring/lemmas.lean
[ "algebra.covariant_and_contravariant", "algebra.group_with_zero.defs" ]
[ "mul_lt_mul_of_pos_right", "mul_pos_strict_mono", "zero_mul" ]
Assumes right covariance.
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
mul_neg_of_neg_of_pos [mul_pos_strict_mono α] (ha : a < 0) (hb : 0 < b) : a * b < 0
by simpa only [zero_mul] using mul_lt_mul_of_pos_right ha hb
lemma
mul_neg_of_neg_of_pos
algebra.order.ring
src/algebra/order/ring/lemmas.lean
[ "algebra.covariant_and_contravariant", "algebra.group_with_zero.defs" ]
[ "mul_lt_mul_of_pos_right", "mul_pos_strict_mono", "zero_mul" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
zero_lt_mul_right [mul_pos_strict_mono α] [mul_pos_reflect_lt α] (h : 0 < c) : 0 < b * c ↔ 0 < b
by { convert mul_lt_mul_right h, simp }
lemma
zero_lt_mul_right
algebra.order.ring
src/algebra/order/ring/lemmas.lean
[ "algebra.covariant_and_contravariant", "algebra.group_with_zero.defs" ]
[ "mul_lt_mul_right", "mul_pos_reflect_lt", "mul_pos_strict_mono" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
left.mul_nonneg [pos_mul_mono α] (ha : 0 ≤ a) (hb : 0 ≤ b) : 0 ≤ a * b
by simpa only [mul_zero] using mul_le_mul_of_nonneg_left hb ha
lemma
left.mul_nonneg
algebra.order.ring
src/algebra/order/ring/lemmas.lean
[ "algebra.covariant_and_contravariant", "algebra.group_with_zero.defs" ]
[ "mul_le_mul_of_nonneg_left", "mul_zero", "pos_mul_mono" ]
Assumes left covariance.
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
mul_nonpos_of_nonneg_of_nonpos [pos_mul_mono α] (ha : 0 ≤ a) (hb : b ≤ 0) : a * b ≤ 0
by simpa only [mul_zero] using mul_le_mul_of_nonneg_left hb ha
lemma
mul_nonpos_of_nonneg_of_nonpos
algebra.order.ring
src/algebra/order/ring/lemmas.lean
[ "algebra.covariant_and_contravariant", "algebra.group_with_zero.defs" ]
[ "mul_le_mul_of_nonneg_left", "mul_zero", "pos_mul_mono" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
right.mul_nonneg [mul_pos_mono α] (ha : 0 ≤ a) (hb : 0 ≤ b) : 0 ≤ a * b
by simpa only [zero_mul] using mul_le_mul_of_nonneg_right ha hb
lemma
right.mul_nonneg
algebra.order.ring
src/algebra/order/ring/lemmas.lean
[ "algebra.covariant_and_contravariant", "algebra.group_with_zero.defs" ]
[ "mul_le_mul_of_nonneg_right", "mul_pos_mono", "zero_mul" ]
Assumes right covariance.
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
mul_nonpos_of_nonpos_of_nonneg [mul_pos_mono α] (ha : a ≤ 0) (hb : 0 ≤ b) : a * b ≤ 0
by simpa only [zero_mul] using mul_le_mul_of_nonneg_right ha hb
lemma
mul_nonpos_of_nonpos_of_nonneg
algebra.order.ring
src/algebra/order/ring/lemmas.lean
[ "algebra.covariant_and_contravariant", "algebra.group_with_zero.defs" ]
[ "mul_le_mul_of_nonneg_right", "mul_pos_mono", "zero_mul" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
pos_of_mul_pos_right [pos_mul_reflect_lt α] (h : 0 < a * b) (ha : 0 ≤ a) : 0 < b
lt_of_mul_lt_mul_left ((mul_zero a).symm ▸ h : a * 0 < a * b) ha
lemma
pos_of_mul_pos_right
algebra.order.ring
src/algebra/order/ring/lemmas.lean
[ "algebra.covariant_and_contravariant", "algebra.group_with_zero.defs" ]
[ "lt_of_mul_lt_mul_left", "mul_zero", "pos_mul_reflect_lt" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83
pos_of_mul_pos_left [mul_pos_reflect_lt α] (h : 0 < a * b) (hb : 0 ≤ b) : 0 < a
lt_of_mul_lt_mul_right ((zero_mul b).symm ▸ h : 0 * b < a * b) hb
lemma
pos_of_mul_pos_left
algebra.order.ring
src/algebra/order/ring/lemmas.lean
[ "algebra.covariant_and_contravariant", "algebra.group_with_zero.defs" ]
[ "lt_of_mul_lt_mul_right", "mul_pos_reflect_lt", "zero_mul" ]
https://github.com/leanprover-community/mathlib
65a1391a0106c9204fe45bc73a039f056558cb83