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start
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Mathlib/Data/Part.lean
Part.bind_of_mem
[ { "state_after": "no goals", "state_before": "α : Type u_1\nβ : Type u_2\nγ : Type ?u.22679\no : Part α\na : α\nh : a ∈ o\nf : α → Part β\n⊢ Part.bind o f = f a", "tactic": "rw [eq_some_iff.2 h, bind_some]" } ]
[ 525, 34 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 524, 1 ]
Mathlib/GroupTheory/GroupAction/Group.lean
MulAction.bijective₀
[]
[ 225, 40 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 224, 11 ]
Mathlib/Order/WellFoundedSet.lean
Set.wellFoundedOn_iff_no_descending_seq
[ { "state_after": "ι : Type ?u.6720\nα : Type u_1\nβ : Type ?u.6726\nr r' : α → α → Prop\ninst✝ : IsStrictOrder α r\ns t : Set α\n⊢ Nonempty ((fun x x_1 => x > x_1) ↪r fun a b => r a b ∧ a ∈ s ∧ b ∈ s) ↔ ∃ x, ∀ (n : ℕ), ↑x n ∈ s", "state_before": "ι : Type ?u.6720\nα : Type u_1\nβ : Type ?u.6726\nr r' : α → ...
[ 158, 45 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 147, 1 ]
Mathlib/Data/ZMod/Basic.lean
ZMod.neg_val
[ { "state_after": "n : ℕ\ninst✝ : NeZero n\na : ZMod n\n⊢ (n - val a) % n = if a = 0 then 0 else n - val a", "state_before": "n : ℕ\ninst✝ : NeZero n\na : ZMod n\n⊢ val (-a) = if a = 0 then 0 else n - val a", "tactic": "rw [neg_val']" }, { "state_after": "case pos\nn : ℕ\ninst✝ : NeZero n\na : ZM...
[ 895, 38 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 888, 1 ]
Mathlib/Topology/Order/Basic.lean
map_coe_Iio_atTop
[]
[ 2526, 35 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 2525, 1 ]
Mathlib/Data/Nat/Interval.lean
Nat.cauchy_induction_two_mul
[]
[ 381, 55 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 379, 1 ]
Mathlib/CategoryTheory/Adhesive.lean
CategoryTheory.IsPushout.IsVanKampen.isPullback_of_mono_left
[ { "state_after": "no goals", "state_before": "J : Type v'\ninst✝² : Category J\nC : Type u\ninst✝¹ : Category C\nW X Y Z : C\nf : W ⟶ X\ng : W ⟶ Y\nh : X ⟶ Z\ni : Y ⟶ Z\ninst✝ : Mono f\nH : IsPushout f g h i\nH' : IsVanKampen H\n⊢ g ≫ 𝟙 Y = 𝟙 W ≫ g", "tactic": "simp" }, { "state_after": "no go...
[ 198, 49 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 194, 1 ]
Mathlib/Data/PFunctor/Multivariate/W.lean
MvPFunctor.wDest'_wMk
[ { "state_after": "no goals", "state_before": "n : ℕ\nP : MvPFunctor (n + 1)\nα : TypeVec n\na : P.A\nf' : B (drop P) a ⟹ α\nf : PFunctor.B (last P) a → W P α\n⊢ wDest' P (wMk P a f' f) = { fst := a, snd := splitFun f' f }", "tactic": "rw [wDest', wRec_eq]" } ]
[ 310, 76 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 309, 1 ]
Mathlib/Topology/Algebra/Group/Basic.lean
GroupTopology.toTopologicalSpace_top
[]
[ 1911, 6 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 1910, 1 ]
Mathlib/Order/SymmDiff.lean
bihimp_top
[ { "state_after": "no goals", "state_before": "ι : Type ?u.37057\nα : Type u_1\nβ : Type ?u.37063\nπ : ι → Type ?u.37068\ninst✝ : GeneralizedHeytingAlgebra α\na b c d : α\n⊢ a ⇔ ⊤ = a", "tactic": "rw [bihimp, himp_top, top_himp, inf_top_eq]" } ]
[ 250, 81 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 250, 1 ]
Mathlib/Data/MvPolynomial/PDeriv.lean
MvPolynomial.pderiv_X_of_ne
[ { "state_after": "no goals", "state_before": "R : Type u\nσ : Type v\na a' a₁ a₂ : R\ns : σ →₀ ℕ\ninst✝ : CommSemiring R\ni j : σ\nh : j ≠ i\n⊢ ↑(pderiv i) (X j) = 0", "tactic": "classical simp [h]" }, { "state_after": "no goals", "state_before": "R : Type u\nσ : Type v\na a' a₁ a₂ : R\ns : ...
[ 107, 21 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 106, 1 ]
Mathlib/Algebra/QuaternionBasis.lean
QuaternionAlgebra.Basis.lift_zero
[ { "state_after": "no goals", "state_before": "R : Type u_2\nA : Type u_1\nB : Type ?u.66514\ninst✝⁴ : CommRing R\ninst✝³ : Ring A\ninst✝² : Ring B\ninst✝¹ : Algebra R A\ninst✝ : Algebra R B\nc₁ c₂ : R\nq : Basis A c₁ c₂\n⊢ lift q 0 = 0", "tactic": "simp [lift]" } ]
[ 118, 66 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 118, 1 ]
Mathlib/GroupTheory/GroupAction/Quotient.lean
MulAction.Quotient.smul_coe
[]
[ 107, 6 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 105, 1 ]
Mathlib/Topology/MetricSpace/Basic.lean
Metric.diam_le_of_forall_dist_le
[]
[ 2624, 67 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 2622, 1 ]
Mathlib/Algebra/BigOperators/Basic.lean
Finset.prod_partition
[ { "state_after": "ι : Type ?u.787616\nβ : Type u\nα : Type v\nγ : Type w\ns s₁ s₂ : Finset α\na : α\nf g : α → β\ninst✝¹ : CommMonoid β\nR : Setoid α\ninst✝ : DecidableRel Setoid.r\nx : α\n_hx : x ∈ s\n⊢ ∏ y in filter (fun x_1 => Quotient.mk R x_1 = Quotient.mk'' x) s, f y =\n ∏ x in filter (fun c' => Quotie...
[ 1591, 6 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 1588, 1 ]
Mathlib/Algebra/Quaternion.lean
Quaternion.normSq_def
[]
[ 1198, 55 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 1198, 1 ]
Mathlib/FieldTheory/Separable.lean
Polynomial.unique_separable_of_irreducible
[ { "state_after": "F : Type u\ninst✝¹ : Field F\nK : Type v\ninst✝ : Field K\np : ℕ\nHF : CharP F p\nf : F[X]\nhf : Irreducible f\nhp : 0 < p\nn₁ n₂ : ℕ\n⊢ ∀ (g₁ : F[X]),\n Separable g₁ →\n ↑(expand F (p ^ n₁)) g₁ = f → ∀ (g₂ : F[X]), Separable g₂ → ↑(expand F (p ^ n₂)) g₂ = f → n₁ = n₂ ∧ g₁ = g₂", "...
[ 396, 24 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 374, 1 ]
Mathlib/Analysis/Convex/Side.lean
Wbtw.wOppSide₁₃
[ { "state_after": "case intro.intro.intro\nR : Type u_1\nV : Type u_2\nV' : Type ?u.208118\nP : Type u_3\nP' : Type ?u.208124\ninst✝⁶ : StrictOrderedCommRing R\ninst✝⁵ : AddCommGroup V\ninst✝⁴ : Module R V\ninst✝³ : AddTorsor V P\ninst✝² : AddCommGroup V'\ninst✝¹ : Module R V'\ninst✝ : AddTorsor V' P'\ns : Affin...
[ 406, 10 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 395, 1 ]
Mathlib/Topology/Algebra/InfiniteSum/Order.lean
tsum_mono
[]
[ 114, 23 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 113, 1 ]
Mathlib/Analysis/NormedSpace/Units.lean
NormedRing.inverse_one_sub_nth_order'
[ { "state_after": "R : Type u_1\ninst✝¹ : NormedRing R\ninst✝ : CompleteSpace R\nn : ℕ\nt : R\nht : ‖t‖ < 1\nthis : Summable fun n => t ^ n\n⊢ (∑ i in range n, t ^ i + t ^ n * ∑' (i : ℕ), t ^ i) = ∑ i in range n, t ^ i + t ^ n * ↑(Units.oneSub t ht)⁻¹", "state_before": "R : Type u_1\ninst✝¹ : NormedRing R\ni...
[ 138, 87 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 132, 1 ]
Std/Data/Nat/Gcd.lean
Nat.gcd_mul_left
[ { "state_after": "no goals", "state_before": "m n k : Nat\n⊢ gcd (m * n) (m * k) = m * gcd n k", "tactic": "induction n, k using gcd.induction with\n| H0 k => simp\n| H1 n k _ IH => rwa [← mul_mod_mul_left, ← gcd_rec, ← gcd_rec] at IH" }, { "state_after": "no goals", "state_before": "case H0...
[ 86, 72 ]
e68aa8f5fe47aad78987df45f99094afbcb5e936
https://github.com/leanprover/std4
[ 83, 1 ]
Mathlib/Order/Basic.lean
Preorder.toLE_injective
[ { "state_after": "case refl\nι : Type ?u.11187\nα✝ : Type u\nβ : Type v\nγ : Type w\nπ : ι → Type ?u.11198\nr : α✝ → α✝ → Prop\nα : Type u_1\nA B : Preorder α\nle✝ A_lt : α → α → Prop\nle_refl✝¹ : ∀ (a : α), a ≤ a\nle_trans✝¹ : ∀ (a b c : α), a ≤ b → b ≤ c → a ≤ c\nA_iff : ∀ (a b : α), a < b ↔ a ≤ b ∧ ¬b ≤ a\nB...
[ 608, 10 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 598, 1 ]
Mathlib/Data/Polynomial/Eval.lean
Polynomial.isRoot_map_iff
[]
[ 1210, 41 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 1208, 1 ]
Mathlib/Data/List/Nodup.lean
List.Nodup.of_append_right
[]
[ 215, 45 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 214, 1 ]
Mathlib/Analysis/SpecialFunctions/Trigonometric/Basic.lean
Real.tan_int_mul_pi_sub
[]
[ 1055, 44 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 1054, 1 ]
Mathlib/LinearAlgebra/Finsupp.lean
Finsupp.lcongr_single
[ { "state_after": "no goals", "state_before": "α : Type ?u.541821\nM : Type u_4\nN : Type u_5\nP : Type ?u.541830\nR : Type u_3\nS : Type ?u.541836\ninst✝⁷ : Semiring R\ninst✝⁶ : Semiring S\ninst✝⁵ : AddCommMonoid M\ninst✝⁴ : Module R M\ninst✝³ : AddCommMonoid N\ninst✝² : Module R N\ninst✝¹ : AddCommMonoid P...
[ 901, 89 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 900, 1 ]
Mathlib/CategoryTheory/Limits/Types.lean
CategoryTheory.Limits.Types.Limit.map_π_apply
[]
[ 203, 29 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 201, 1 ]
Mathlib/RingTheory/IntegralClosure.lean
isIntegral_algebraMap
[]
[ 82, 35 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 81, 1 ]
Mathlib/Data/Nat/Pow.lean
Nat.one_le_two_pow
[ { "state_after": "no goals", "state_before": "n : ℕ\n⊢ 0 < 2", "tactic": "decide" } ]
[ 69, 29 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 68, 1 ]
Mathlib/CategoryTheory/Limits/Opposites.lean
CategoryTheory.Limits.PullbackCone.op_inl
[ { "state_after": "no goals", "state_before": "C : Type u₁\ninst✝¹ : Category C\nJ : Type u₂\ninst✝ : Category J\nX✝ : Type v₂\nX Y Z : C\nf : X ⟶ Z\ng : Y ⟶ Z\nc : PullbackCone f g\n⊢ PushoutCocone.inl (op c) = (fst c).op", "tactic": "aesop_cat" } ]
[ 541, 15 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 540, 1 ]
Mathlib/Algebra/Module/LinearMap.lean
LinearMap.ext_ring_iff
[]
[ 493, 30 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 492, 1 ]
Mathlib/Data/MvPolynomial/Monad.lean
MvPolynomial.vars_bind₁
[ { "state_after": "case calc_1\nσ : Type u_3\nτ : Type u_1\nR : Type u_2\nS : Type ?u.1324347\nT : Type ?u.1324350\ninst✝³ : CommSemiring R\ninst✝² : CommSemiring S\ninst✝¹ : CommSemiring T\nf✝ : σ → MvPolynomial τ R\ninst✝ : DecidableEq τ\nf : σ → MvPolynomial τ R\nφ : MvPolynomial σ R\n⊢ (Finset.biUnion (suppo...
[ 389, 48 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 360, 1 ]
Mathlib/Data/Part.lean
Part.map_bind
[ { "state_after": "α : Type u_3\nβ : Type u_2\nγ✝ : Type ?u.32518\nγ : Type u_1\nf : α → Part β\nx : Part α\ng : β → γ\n⊢ (Part.bind x fun x => Part.bind (f x) (some ∘ g)) = Part.bind x fun y => map g (f y)", "state_before": "α : Type u_3\nβ : Type u_2\nγ✝ : Type ?u.32518\nγ : Type u_1\nf : α → Part β\nx : P...
[ 559, 63 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 557, 1 ]
Mathlib/Algebra/Order/Group/Abs.lean
abs_pos_of_pos
[]
[ 144, 22 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 143, 1 ]
Mathlib/Algebra/Order/Rearrangement.lean
Monovary.sum_mul_comp_perm_lt_sum_mul_iff
[]
[ 473, 41 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 471, 1 ]
Mathlib/Data/Set/Function.lean
Function.invFunOn_mem
[]
[ 1219, 24 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 1218, 1 ]
Mathlib/Data/Fintype/Card.lean
Infinite.exists_not_mem_finset
[]
[ 1001, 45 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 1000, 1 ]
Mathlib/MeasureTheory/Group/MeasurableEquiv.lean
MeasurableEquiv.toEquiv_mulRight
[]
[ 163, 6 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 162, 1 ]
Mathlib/Order/Filter/AtTopBot.lean
Filter.eventually_atTop_curry
[ { "state_after": "ι : Type ?u.304213\nι' : Type ?u.304216\nα : Type u_1\nβ : Type u_2\nγ : Type ?u.304225\ninst✝¹ : SemilatticeSup α\ninst✝ : SemilatticeSup β\np : α × β → Prop\nhp : ∀ᶠ (x : α × β) in atTop ×ˢ atTop, p x\n⊢ ∀ᶠ (k : α) in atTop, ∀ᶠ (l : β) in atTop, p (k, l)", "state_before": "ι : Type ?u.30...
[ 1491, 17 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 1488, 1 ]
Mathlib/Order/Filter/Basic.lean
Filter.sup_principal
[ { "state_after": "no goals", "state_before": "α : Type u\nβ : Type v\nγ : Type w\nδ : Type ?u.116167\nι : Sort x\nf g : Filter α\ns✝ t✝ s t u : Set α\n⊢ u ∈ 𝓟 s ⊔ 𝓟 t ↔ u ∈ 𝓟 (s ∪ t)", "tactic": "simp only [union_subset_iff, mem_sup, mem_principal]" } ]
[ 972, 78 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 971, 1 ]
Mathlib/Data/Holor.lean
Holor.slice_eq
[ { "state_after": "α : Type\nd : ℕ\nds ds₁ ds₂ ds₃ : List ℕ\nx y : Holor α (d :: ds)\nh : slice x = slice y\nt : HolorIndex (d :: ds)\ni : ℕ\nis : List ℕ\nhiis : ↑t = i :: is\n⊢ Forall₂ (fun x x_1 => x < x_1) (↑t) (d :: ds)", "state_before": "α : Type\nd : ℕ\nds ds₁ ds₂ ds₃ : List ℕ\nx y : Holor α (d :: ds)\...
[ 262, 72 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 253, 1 ]
Mathlib/Probability/ProbabilityMassFunction/Constructions.lean
Pmf.support_ofFinset
[ { "state_after": "no goals", "state_before": "α : Type u_1\nβ : Type ?u.124309\nγ : Type ?u.124312\nf : α → ℝ≥0∞\ns : Finset α\nh : ∑ a in s, f a = 1\nh' : ∀ (a : α), ¬a ∈ s → f a = 0\na : α\n⊢ a ∈ support (ofFinset f s h h') ↔ a ∈ ↑s ∩ Function.support f", "tactic": "simpa [mem_support_iff] using mt (h...
[ 170, 62 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 169, 1 ]
Mathlib/Order/Filter/Pointwise.lean
Filter.mul_eq_one_iff
[ { "state_after": "case refine'_1\nF : Type ?u.290745\nα : Type u_1\nβ : Type ?u.290751\nγ : Type ?u.290754\nδ : Type ?u.290757\nε : Type ?u.290760\ninst✝ : DivisionMonoid α\nf g : Filter α\nhfg : f * g = 1\n⊢ ∃ a b, f = pure a ∧ g = pure b ∧ a * b = 1\n\ncase refine'_2\nF : Type ?u.290745\nα : Type u_1\nβ : Typ...
[ 754, 36 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 744, 11 ]
Mathlib/MeasureTheory/Measure/OpenPos.lean
MeasureTheory.Measure.measure_pos_of_mem_nhds
[]
[ 66, 72 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 65, 1 ]
Mathlib/Data/Real/Hyperreal.lean
Hyperreal.epsilon_pos
[]
[ 186, 27 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 185, 1 ]
Mathlib/Data/Polynomial/Degree/Definitions.lean
Polynomial.degree_C_le
[ { "state_after": "case pos\nR : Type u\nS : Type v\na b c d : R\nn m : ℕ\ninst✝ : Semiring R\np q r : R[X]\nh : a = 0\n⊢ degree (↑C a) ≤ 0\n\ncase neg\nR : Type u\nS : Type v\na b c d : R\nn m : ℕ\ninst✝ : Semiring R\np q r : R[X]\nh : ¬a = 0\n⊢ degree (↑C a) ≤ 0", "state_before": "R : Type u\nS : Type v\na...
[ 258, 20 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 254, 1 ]
Mathlib/Algebra/Star/Unitary.lean
unitary.mul_star_self_of_mem
[]
[ 66, 7 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 65, 1 ]
Std/Logic.lean
not_and
[]
[ 316, 57 ]
e68aa8f5fe47aad78987df45f99094afbcb5e936
https://github.com/leanprover/std4
[ 316, 9 ]
Mathlib/Topology/Algebra/Group/Basic.lean
QuotientGroup.continuous_smul₁
[ { "state_after": "case H\nα : Type u\nβ : Type v\nG : Type w\nH : Type x\ninst✝² : Group G\ninst✝¹ : TopologicalSpace G\ninst✝ : ContinuousMul G\nΓ : Subgroup G\nz✝ : G\n⊢ Continuous fun g => g • ↑z✝", "state_before": "α : Type u\nβ : Type v\nG : Type w\nH : Type x\ninst✝² : Group G\ninst✝¹ : TopologicalSpa...
[ 1723, 62 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 1721, 1 ]
Mathlib/RingTheory/Subring/Basic.lean
Subring.neg_mem
[]
[ 363, 10 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 362, 11 ]
Mathlib/CategoryTheory/Monoidal/Category.lean
CategoryTheory.MonoidalCategory.rightAssocTensor_obj
[]
[ 440, 6 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 439, 1 ]
Mathlib/Data/PNat/Interval.lean
PNat.map_subtype_embedding_Icc
[]
[ 48, 81 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 47, 1 ]
Mathlib/Data/Polynomial/Splits.lean
Polynomial.splits_of_natDegree_le_one
[]
[ 107, 59 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 106, 1 ]
Mathlib/Topology/Algebra/Polynomial.lean
Polynomial.coeff_le_of_roots_le
[ { "state_after": "case inl\nα : Type ?u.183469\nR : Type ?u.183472\ninst✝³ : NormedRing R\ninst✝² : IsAbsoluteValue norm\nF : Type u_1\nK : Type u_2\ninst✝¹ : CommRing F\ninst✝ : NormedField K\np : F[X]\nf : F →+* K\nB : ℝ\ni : ℕ\nh1 : Monic p\nh2 : Splits f p\nh3 : ∀ (z : K), z ∈ roots (map f p) → ‖z‖ ≤ B\nhB ...
[ 191, 33 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 165, 1 ]
Mathlib/Data/Multiset/Basic.lean
Multiset.countp_add
[ { "state_after": "no goals", "state_before": "α : Type u_1\nβ : Type ?u.299485\nγ : Type ?u.299488\np : α → Prop\ninst✝ : DecidablePred p\ns t : Multiset α\n⊢ countp p (s + t) = countp p s + countp p t", "tactic": "simp [countp_eq_card_filter]" } ]
[ 2235, 31 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 2234, 1 ]
Mathlib/NumberTheory/Multiplicity.lean
Int.two_pow_two_pow_sub_pow_two_pow
[ { "state_after": "no goals", "state_before": "R : Type ?u.857609\nn✝ : ℕ\nx y : ℤ\nn : ℕ\nhxy : 4 ∣ x - y\nhx : ¬2 ∣ x\n⊢ multiplicity 2 (x ^ 2 ^ n - y ^ 2 ^ n) = multiplicity 2 (x - y) + ↑n", "tactic": "simp only [pow_two_pow_sub_pow_two_pow n, multiplicity.mul Int.prime_two,\n multiplicity.Finset.pro...
[ 307, 82 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 303, 1 ]
Mathlib/Data/Nat/Multiplicity.lean
Nat.Prime.multiplicity_self
[]
[ 95, 62 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 94, 1 ]
Mathlib/RingTheory/Subsemiring/Pointwise.lean
Subsemiring.smul_closure
[]
[ 90, 27 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 89, 1 ]
Mathlib/RingTheory/RootsOfUnity/Basic.lean
RingEquiv.restrictRootsOfUnity_symm
[]
[ 181, 6 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 179, 1 ]
Mathlib/Analysis/NormedSpace/CompactOperator.lean
IsCompactOperator.continuous_comp
[ { "state_after": "case intro.intro\nR₁ : Type ?u.179451\nR₂ : Type ?u.179454\nR₃ : Type ?u.179457\ninst✝⁷ : Semiring R₁\ninst✝⁶ : Semiring R₂\ninst✝⁵ : Semiring R₃\nσ₁₂ : R₁ →+* R₂\nσ₂₃ : R₂ →+* R₃\nM₁ : Type u_1\nM₂ : Type u_2\nM₃ : Type u_3\ninst✝⁴ : TopologicalSpace M₁\ninst✝³ : TopologicalSpace M₂\ninst✝² :...
[ 270, 50 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 265, 1 ]
Mathlib/Analysis/SpecialFunctions/Trigonometric/ComplexDeriv.lean
Complex.continuousAt_tan
[ { "state_after": "x : ℂ\nhc : ContinuousAt tan x\nh₀ : cos x = 0\n⊢ False", "state_before": "x : ℂ\n⊢ ContinuousAt tan x ↔ cos x ≠ 0", "tactic": "refine' ⟨fun hc h₀ => _, fun h => (hasDerivAt_tan h).continuousAt⟩" }, { "state_after": "no goals", "state_before": "x : ℂ\nhc : ContinuousAt tan ...
[ 61, 44 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 58, 1 ]
Mathlib/Algebra/Star/StarAlgHom.lean
NonUnitalStarAlgHom.one_apply
[]
[ 249, 6 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 248, 1 ]
Mathlib/CategoryTheory/Limits/Over.lean
CategoryTheory.Over.epi_left_of_epi
[]
[ 69, 38 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 68, 1 ]
Mathlib/Data/Set/Basic.lean
Set.diff_compl
[]
[ 1963, 14 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 1962, 1 ]
Mathlib/Data/Set/Prod.lean
Set.prod_diff_prod
[ { "state_after": "case h\nα : Type u_1\nβ : Type u_2\nγ : Type ?u.85553\nδ : Type ?u.85556\ns s₁ s₂ : Set α\nt t₁ t₂ : Set β\na : α\nb : β\nx : α × β\n⊢ x ∈ s ×ˢ t \\ s₁ ×ˢ t₁ ↔ x ∈ s ×ˢ (t \\ t₁) ∪ (s \\ s₁) ×ˢ t", "state_before": "α : Type u_1\nβ : Type u_2\nγ : Type ?u.85553\nδ : Type ?u.85556\ns s₁ s₂ :...
[ 378, 65 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 376, 1 ]
Mathlib/RingTheory/Valuation/Basic.lean
Valuation.comap_supp
[ { "state_after": "no goals", "state_before": "K : Type ?u.4018726\nF : Type ?u.4018729\nR : Type u_2\ninst✝⁵ : DivisionRing K\nΓ₀ : Type u_3\nΓ'₀ : Type ?u.4018741\nΓ''₀ : Type ?u.4018744\ninst✝⁴ : LinearOrderedCommMonoidWithZero Γ''₀\ninst✝³ : CommRing R\ninst✝² : LinearOrderedCommMonoidWithZero Γ₀\ninst✝¹...
[ 589, 86 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 587, 1 ]
Mathlib/MeasureTheory/Measure/Haar/Basic.lean
MeasureTheory.Measure.haar.prehaar_sup_eq
[ { "state_after": "G : Type u_1\ninst✝² : Group G\ninst✝¹ : TopologicalSpace G\ninst✝ : TopologicalGroup G\nK₀ : PositiveCompacts G\nU : Set G\nK₁ K₂ : Compacts G\nhU : Set.Nonempty (interior U)\nh : Disjoint (K₁.carrier * U⁻¹) (K₂.carrier * U⁻¹)\n⊢ ↑(index (↑(K₁ ⊔ K₂)) U) / ↑(index (↑K₀) U) = ↑(index (↑K₁) U) /...
[ 350, 43 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 344, 1 ]
Mathlib/Data/Polynomial/Degree/Definitions.lean
Polynomial.supp_subset_range_natDegree_succ
[]
[ 207, 41 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 206, 1 ]
Mathlib/Analysis/InnerProductSpace/Projection.lean
Submodule.finrank_add_finrank_orthogonal'
[ { "state_after": "𝕜 : Type u_1\nE : Type u_2\nF : Type ?u.1011570\ninst✝⁵ : IsROrC 𝕜\ninst✝⁴ : NormedAddCommGroup E\ninst✝³ : NormedAddCommGroup F\ninst✝² : InnerProductSpace 𝕜 E\ninst✝¹ : InnerProductSpace ℝ F\nK✝ : Submodule 𝕜 E\ninst✝ : FiniteDimensional 𝕜 E\nK : Submodule 𝕜 E\nn : ℕ\nh_dim : finrank �...
[ 1120, 57 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 1117, 1 ]
Mathlib/Algebra/AddTorsor.lean
vsub_right_cancel
[ { "state_after": "G : Type u_1\nP : Type u_2\ninst✝ : AddGroup G\nT : AddTorsor G P\np1 p2 p : P\nh : p -ᵥ p1 = p -ᵥ p2\n⊢ p -ᵥ p2 +ᵥ p1 = p -ᵥ p2 +ᵥ p2", "state_before": "G : Type u_1\nP : Type u_2\ninst✝ : AddGroup G\nT : AddTorsor G P\np1 p2 p : P\nh : p -ᵥ p1 = p -ᵥ p2\n⊢ p1 = p2", "tactic": "refine...
[ 230, 33 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 228, 1 ]
Mathlib/Data/Set/Intervals/Basic.lean
Set.Icc_inter_Icc_eq_singleton
[ { "state_after": "no goals", "state_before": "α : Type u_1\nβ : Type ?u.183836\ninst✝ : Lattice α\na b c a₁ a₂ b₁ b₂ : α\nhab : a ≤ b\nhbc : b ≤ c\n⊢ Icc a b ∩ Icc b c = {b}", "tactic": "rw [Icc_inter_Icc, sup_of_le_right hab, inf_of_le_left hbc, Icc_self]" } ]
[ 1762, 72 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 1761, 1 ]
Mathlib/Data/List/Lattice.lean
List.mem_inter_of_mem_of_mem
[ { "state_after": "no goals", "state_before": "α : Type u_1\nl l₁ l₂ : List α\np : α → Prop\na : α\ninst✝ : DecidableEq α\nh₁ : a ∈ l₁\nh₂ : a ∈ l₂\n⊢ decide (a ∈ l₂) = true", "tactic": "simpa using h₂" } ]
[ 163, 43 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 162, 1 ]
Mathlib/Data/Finset/Lattice.lean
Finset.sup'_map
[ { "state_after": "F : Type ?u.263099\nα : Type u_3\nβ : Type u_2\nγ : Type u_1\nι : Type ?u.263111\nκ : Type ?u.263114\ninst✝ : SemilatticeSup α\ns✝ : Finset β\nH : Finset.Nonempty s✝\nf✝ : β → α\ns : Finset γ\nf : γ ↪ β\ng : β → α\nhs : Finset.Nonempty (map f s)\nhs' : optParam (Finset.Nonempty s) (_ : Finset....
[ 887, 6 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 884, 1 ]
Mathlib/Analysis/SpecialFunctions/Trigonometric/Basic.lean
Real.cos_pi_div_thirty_two
[ { "state_after": "x : ℝ\n⊢ cos (π / 32) = cos (π / 2 ^ 5)\n\nx : ℝ\n⊢ cos (π / 2 ^ 5) = sqrt (2 + sqrt (2 + sqrt (2 + sqrt 2))) / 2", "state_before": "x : ℝ\n⊢ cos (π / 32) = sqrt (2 + sqrt (2 + sqrt (2 + sqrt 2))) / 2", "tactic": "trans cos (π / 2 ^ 5)" }, { "state_after": "case e_x.e_a\nx : ℝ\...
[ 833, 7 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 829, 1 ]
Mathlib/CategoryTheory/Abelian/Homology.lean
homology.π'_eq_π
[ { "state_after": "A : Type u\ninst✝¹ : Category A\ninst✝ : Abelian A\nX Y Z : A\nf : X ⟶ Y\ng : Y ⟶ Z\nw : f ≫ g = 0\n⊢ (kernelSubobjectIso g).hom ≫\n cokernel.π (kernel.lift g f w) ≫\n ((cokernelIsoOfEq (_ : factorThruImage f ≫ imageToKernel' f g w = kernel.lift g f w)).inv ≫\n cokernel....
[ 202, 7 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 197, 1 ]
Mathlib/Data/List/Basic.lean
List.get?_pmap
[ { "state_after": "case nil\nι : Type ?u.332299\nα : Type u\nβ : Type v\nγ : Type w\nδ : Type x\nl₁ l₂ : List α\np : α → Prop\nf : (a : α) → p a → β\nl : List α\nh✝ : ∀ (a : α), a ∈ l → p a\nn✝ : ℕ\nh : ∀ (a : α), a ∈ [] → p a\nn : ℕ\n⊢ get? (pmap f [] h) n = Option.pmap f (get? [] n) (_ : ∀ (x : α), x ∈ get? []...
[ 3185, 16 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 3179, 1 ]
Mathlib/Data/List/Cycle.lean
Cycle.toFinset_eq_nil
[ { "state_after": "no goals", "state_before": "α : Type u_1\ninst✝ : DecidableEq α\ns : Cycle α\n⊢ ∀ (a : List α), toFinset (Quotient.mk'' a) = ∅ ↔ Quotient.mk'' a = nil", "tactic": "simp" } ]
[ 820, 36 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 819, 1 ]
Mathlib/Algebra/DirectSum/Basic.lean
DirectSum.addHom_ext
[]
[ 177, 24 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 175, 1 ]
Mathlib/Data/IsROrC/Basic.lean
IsROrC.ofReal_sub
[]
[ 231, 31 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 230, 1 ]
Mathlib/Order/Filter/Pointwise.lean
Filter.le_vsub_iff
[]
[ 1157, 14 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 1156, 1 ]
Mathlib/Analysis/SpecialFunctions/Pow/NNReal.lean
ENNReal.zero_rpow_mul_self
[ { "state_after": "y : ℝ\n⊢ ((if 0 < y then 0 else if y = 0 then 1 else ⊤) * if 0 < y then 0 else if y = 0 then 1 else ⊤) =\n if 0 < y then 0 else if y = 0 then 1 else ⊤", "state_before": "y : ℝ\n⊢ 0 ^ y * 0 ^ y = 0 ^ y", "tactic": "rw [zero_rpow_def]" }, { "state_after": "case inl\ny : ℝ\nh✝ ...
[ 348, 59 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 345, 1 ]
Mathlib/Data/List/BigOperators/Lemmas.lean
List.sum_map_mul_right
[]
[ 133, 45 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 131, 1 ]
Mathlib/Analysis/Convex/Combination.lean
Finset.centerMass_le_sup
[ { "state_after": "R : Type ?u.72208\nE : Type ?u.72211\nF : Type ?u.72214\nι : Type ?u.72217\nι' : Type ?u.72220\nα : Type ?u.72223\ninst✝⁷ : LinearOrderedField R\ninst✝⁶ : AddCommGroup E\ninst✝⁵ : AddCommGroup F\ninst✝⁴ : LinearOrderedAddCommGroup α\ninst✝³ : Module R E\ninst✝² : Module R F\ninst✝¹ : Module R ...
[ 141, 81 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 137, 1 ]
Mathlib/Topology/Semicontinuous.lean
LowerSemicontinuous.isClosed_preimage
[]
[ 280, 51 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 278, 1 ]
Mathlib/Data/Finset/Sort.lean
Finset.sort_sorted
[]
[ 42, 27 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 41, 1 ]
Mathlib/FieldTheory/RatFunc.lean
RatFunc.div_smul
[ { "state_after": "no goals", "state_before": "K : Type u\ninst✝⁴ : CommRing K\ninst✝³ : IsDomain K\nR : Type u_1\ninst✝² : Monoid R\ninst✝¹ : DistribMulAction R K[X]\ninst✝ : IsScalarTower R K[X] K[X]\nc : R\np q : K[X]\n⊢ ↑(algebraMap K[X] (RatFunc K)) (c • p) / ↑(algebraMap K[X] (RatFunc K)) q =\n c • ...
[ 848, 42 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 844, 1 ]
Mathlib/Data/Multiset/Powerset.lean
Multiset.powersetAux_perm
[]
[ 79, 68 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 77, 1 ]
Mathlib/Topology/Algebra/Module/Basic.lean
ContinuousLinearEquiv.comp_continuousOn_iff
[]
[ 1903, 43 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 1901, 1 ]
Mathlib/MeasureTheory/Measure/Haar/Basic.lean
MeasureTheory.Measure.haar.prehaar_mem_haarProduct
[ { "state_after": "case mk\nG : Type u_1\ninst✝² : Group G\ninst✝¹ : TopologicalSpace G\ninst✝ : TopologicalGroup G\nK₀ : PositiveCompacts G\nU : Set G\nhU : Set.Nonempty (interior U)\nK : Set G\nhK : IsCompact K\na✝ : { carrier := K, isCompact' := hK } ∈ univ\n⊢ prehaar (↑K₀) U { carrier := K, isCompact' := hK ...
[ 369, 90 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 367, 1 ]
Mathlib/MeasureTheory/Integral/IntervalIntegral.lean
intervalIntegral.integral_sub
[ { "state_after": "no goals", "state_before": "ι : Type ?u.12882374\n𝕜 : Type ?u.12882377\nE : Type u_1\nF : Type ?u.12882383\nA : Type ?u.12882386\ninst✝² : NormedAddCommGroup E\ninst✝¹ : CompleteSpace E\ninst✝ : NormedSpace ℝ E\na b : ℝ\nf g : ℝ → E\nμ : MeasureTheory.Measure ℝ\nhf : IntervalIntegrable f ...
[ 600, 94 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 598, 1 ]
Mathlib/Data/Polynomial/Induction.lean
Polynomial.induction_on'
[ { "state_after": "R : Type u\nS : Type v\nT : Type w\nι : Type x\nk : Type y\nA : Type z\na✝ b : R\nm n✝ : ℕ\ninst✝ : Semiring R\np✝ q r : R[X]\nM : R[X] → Prop\np : R[X]\nh_add : ∀ (p q : R[X]), M p → M q → M (p + q)\nh_monomial : ∀ (n : ℕ) (a : R), M (↑(monomial n) a)\nn : ℕ\na : R\n_h : M (↑C a * X ^ n)\n⊢ M...
[ 69, 58 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 66, 11 ]
Mathlib/Topology/Constructions.lean
continuousAt_snd
[]
[ 378, 30 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 377, 1 ]
Mathlib/Data/Nat/Parity.lean
Nat.not_odd_iff
[ { "state_after": "no goals", "state_before": "m n : ℕ\n⊢ ¬Odd n ↔ n % 2 = 0", "tactic": "rw [odd_iff, mod_two_ne_one]" } ]
[ 57, 76 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 57, 1 ]
Mathlib/Geometry/Euclidean/Basic.lean
EuclideanGeometry.orthogonalProjection_vsub_mem_direction
[]
[ 366, 59 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 363, 1 ]
Std/Data/Int/Lemmas.lean
Int.lt_trichotomy
[]
[ 672, 34 ]
e68aa8f5fe47aad78987df45f99094afbcb5e936
https://github.com/leanprover/std4
[ 669, 11 ]
Mathlib/Algebra/GroupPower/Lemmas.lean
Nat.ofAdd_mul
[]
[ 1213, 27 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 1212, 1 ]
Mathlib/Data/Real/Pi/Bounds.lean
Real.pi_gt_31415
[ { "state_after": "no goals", "state_before": "⊢ 3.1415 < π", "tactic": "pi_lower_bound\n [11482 / 8119, 5401 / 2923, 2348 / 1197, 11367 / 5711, 25705 / 12868, 23235 / 11621]" } ]
[ 183, 93 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 181, 1 ]
Mathlib/Topology/MetricSpace/Completion.lean
LipschitzWith.completion_map
[]
[ 205, 67 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 203, 1 ]
Mathlib/Data/MvPolynomial/Division.lean
MvPolynomial.zero_divMonomial
[]
[ 67, 32 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 66, 1 ]
Mathlib/Algebra/Lie/TensorProduct.lean
TensorProduct.LieModule.lie_tmul_right
[ { "state_after": "no goals", "state_before": "R : Type u\ninst✝¹⁸ : CommRing R\nL : Type v\nM : Type w\nN : Type w₁\nP : Type w₂\nQ : Type w₃\ninst✝¹⁷ : LieRing L\ninst✝¹⁶ : LieAlgebra R L\ninst✝¹⁵ : AddCommGroup M\ninst✝¹⁴ : Module R M\ninst✝¹³ : LieRingModule L M\ninst✝¹² : LieModule R L M\ninst✝¹¹ : AddC...
[ 90, 51 ]
5a919533f110b7d76410134a237ee374f24eaaad
https://github.com/leanprover-community/mathlib4
[ 87, 1 ]