SnirBroshi

SnirBroshi/mathlib4

The math library of Lean 4

1 stars 0 forks 1 watchers Apache License 2.0
View on GitHub Website
77 Open Issues Need Help Last updated: Jun 27, 2026

Open Issues Need Help

View All on GitHub
[`SimpleGraph`] Properties and operations about 22 hours ago
help wanted graph-theory
SnirBroshi/mathlib4
1

The math library of Lean 4

[`SimpleGraph/Clique`] Expand independent sets API 1 day ago
help wanted graph-theory
SnirBroshi/mathlib4
1

The math library of Lean 4

CA and CN groups 1 day ago
help wanted group-theory
SnirBroshi/mathlib4
1

The math library of Lean 4

Define `Cardinal.choose` and `ENat.choose` 1 day ago
help wanted
SnirBroshi/mathlib4
1

The math library of Lean 4

[`Order/Zorn`] Strengthen Zorn's lemma in preorders 3 days ago
help wanted order
SnirBroshi/mathlib4
1

The math library of Lean 4

[`SimpleGraph/Circulant`] `(cycleGraph <| 2 * k + 3)ᶜ.cliqueNum = k` 3 days ago
help wanted graph-theory
SnirBroshi/mathlib4
1

The math library of Lean 4

[`Topology`] Continuous iff forall sets 3 days ago
help wanted topology
SnirBroshi/mathlib4
1

The math library of Lean 4

[`Algebra` and `Order`] Properties of subobject lattices 16 days ago
help wanted algebra order
SnirBroshi/mathlib4
1

The math library of Lean 4

[`Logic/Relation`] add missing theorems and instances 17 days ago
help wanted
SnirBroshi/mathlib4
1

The math library of Lean 4

[`GroupTheory`] Locally cyclic groups 20 days ago
help wanted group-theory
SnirBroshi/mathlib4
1

The math library of Lean 4

Relate list predicates with their counterparts 23 days ago
help wanted
SnirBroshi/mathlib4
1

The math library of Lean 4

[`Order`] Mac Lane's condition for upper-modular lattices 27 days ago
help wanted order
SnirBroshi/mathlib4
1

The math library of Lean 4

[`Order`] An infinite complete boolean algebra is uncountable 27 days ago
help wanted order
SnirBroshi/mathlib4
1

The math library of Lean 4

[`Order`] Cool lattice results 28 days ago
help wanted order
SnirBroshi/mathlib4
1

The math library of Lean 4

[`Algebra` and `Order`] Missing `CompleteLattice` instances about 1 month ago
help wanted algebra order
SnirBroshi/mathlib4
1

The math library of Lean 4

`Real.exp` sequence bounds about 1 month ago
help wanted analysis
SnirBroshi/mathlib4
1

The math library of Lean 4

[`Algebra` & `Order`] Properties of the divisor lattice about 1 month ago
help wanted algebra order
SnirBroshi/mathlib4
1

The math library of Lean 4

Jacobian and Hessian matrix about 1 month ago
help wanted analysis
SnirBroshi/mathlib4
1

The math library of Lean 4

[`GroupTheory` & `Order`] Ore's theorem about 1 month ago
help wanted group-theory order
SnirBroshi/mathlib4
1

The math library of Lean 4

[`GroupTheory` & `Order`] Lattice-isomorphic groups about 1 month ago
help wanted group-theory order
SnirBroshi/mathlib4
1

The math library of Lean 4

Matrix diagonalization / similarity / Jordan normal form about 1 month ago
help wanted
SnirBroshi/mathlib4
1

The math library of Lean 4

[`SimpleGraph`] The Rado graph about 1 month ago
help wanted graph-theory
SnirBroshi/mathlib4
1

The math library of Lean 4

[`Analysis/MeanInequalities`] Fill in API about 1 month ago
help wanted analysis
SnirBroshi/mathlib4
1

The math library of Lean 4

[`SimpleGraph`] Petersen's theorem about 1 month ago
help wanted graph-theory
SnirBroshi/mathlib4
1

The math library of Lean 4

[`SimpleGraph`] Define the Petersen graph about 1 month ago
help wanted graph-theory
SnirBroshi/mathlib4
1

The math library of Lean 4

[`SimpleGraph/Walk`] Properties and operations about 1 month ago
help wanted graph-theory
SnirBroshi/mathlib4
1

The math library of Lean 4

[`SimpleGraph/Hamiltonian`] Graphs with Hamiltonian/Eulerian walks are connected about 2 months ago
help wanted graph-theory
SnirBroshi/mathlib4
1

The math library of Lean 4

[`SimpleGraph/Trails`] existence of an Eulerian walk about 2 months ago
help wanted graph-theory
SnirBroshi/mathlib4
1

The math library of Lean 4

[`SimpleGraph/Eulerian`] Explicit construction of an Eulerian circuit for `completeGraph (Fin (2 * n + 1))` about 2 months ago
help wanted graph-theory
SnirBroshi/mathlib4
1

The math library of Lean 4

Bundle matrix morphisms about 2 months ago
help wanted algebra
SnirBroshi/mathlib4
1

The math library of Lean 4

Skew-symmetric / skew-hermitian matrices about 2 months ago
help wanted
SnirBroshi/mathlib4
1

The math library of Lean 4

[`Combinatorics/Enumerative/Stirling`] relate both kinds of Stirling numbers to counting problems about 2 months ago
help wanted
SnirBroshi/mathlib4
1

The math library of Lean 4

[`SimpleGraph`] `Sigma` operation about 2 months ago
help wanted graph-theory
SnirBroshi/mathlib4
1

The math library of Lean 4

[`SimpleGraph/Prod`] Coloring API for the tensor product 2 months ago
help wanted graph-theory
SnirBroshi/mathlib4
1

The math library of Lean 4

[`SimpleGraph/LapMatrix`] Spectra of known graphs 3 months ago
help wanted graph-theory
SnirBroshi/mathlib4
1

The math library of Lean 4

Complex analysis 3 months ago
help wanted analysis
SnirBroshi/mathlib4
1

The math library of Lean 4

[`RingTheory/RootsOfUnity`] The sum of all roots of unity is 0 and other trivial stuff 3 months ago
help wanted analysis
SnirBroshi/mathlib4
1

The math library of Lean 4

`Subtype.restrict` / `Set.restrict` / `Finset.restrict` 3 months ago
help wanted
SnirBroshi/mathlib4
1

The math library of Lean 4

Properties of `Matrix.rank` / `Matrix.cRank` 3 months ago
help wanted algebra
SnirBroshi/mathlib4
1

The math library of Lean 4

Summing `ENat` 4 months ago
help wanted
SnirBroshi/mathlib4
1

The math library of Lean 4

[`SimpleGraph`] Menger's theorems 4 months ago
help wanted graph-theory
SnirBroshi/mathlib4
1

The math library of Lean 4

[`SimpleGraph/Paths`] Any two longest paths in a preconnected graph intersect 4 months ago
help wanted graph-theory
SnirBroshi/mathlib4
1

The math library of Lean 4

[`RingTheory/Algebraic`] `Transcendental`/`IsAlgebraic` over fraction rings 4 months ago
help wanted algebra
SnirBroshi/mathlib4
1

The math library of Lean 4

Integral representation of the Zeta function 5 months ago
help wanted analysis
SnirBroshi/mathlib4
1

The math library of Lean 4

[`NumberTheory/Real/Irrational`] `Decidable <| Irrational <| q ^ p` for `q p : ℚ` 5 months ago
help wanted number-theory
SnirBroshi/mathlib4
1

The math library of Lean 4

[`Counterexamples`] Lakes of Wada 5 months ago
help wanted topology
SnirBroshi/mathlib4
1

The math library of Lean 4

[`Analysis/SpecialFunctions/Gamma/Beta`] `Γ(s - 1) = Γ(s + 1)` iff 5 months ago
help wanted analysis
SnirBroshi/mathlib4
1

The math library of Lean 4

[`NumberTheory/Transcendental/Liouville/LiouvilleNumber`] Liouville numbers using digits other than 1 5 months ago
help wanted number-theory
SnirBroshi/mathlib4
1

The math library of Lean 4

[`SimpleGraph/Paths`] A walk is a path iff its subgraph is acyclic 5 months ago
help wanted graph-theory
SnirBroshi/mathlib4
1

The math library of Lean 4

[`SimpleGraph/Connectivity`] Connectivity vs adding edges 5 months ago
help wanted graph-theory
SnirBroshi/mathlib4
1

The math library of Lean 4

[`NumberTheory/SumThreeSquares`] Legendre's three-square theorem 6 months ago
help wanted number-theory
SnirBroshi/mathlib4
1

The math library of Lean 4

[`Algebra/LinearRecurrence`] Pisano periods 6 months ago
help wanted
SnirBroshi/mathlib4
1

The math library of Lean 4

Circumference of a circle 6 months ago
help wanted
SnirBroshi/mathlib4
1

The math library of Lean 4

[`Analysis/Normed/Algebra/MatrixExponential`] det / trace / eigenvalues 6 months ago
help wanted
SnirBroshi/mathlib4
1

The math library of Lean 4

Van der Waerden and Schur numbers 6 months ago
help wanted
SnirBroshi/mathlib4
1

The math library of Lean 4

[`SimpleGraph/Acyclic`] Add `IsTrail` versions of acyclic theorems 6 months ago
help wanted graph-theory
SnirBroshi/mathlib4
1

The math library of Lean 4

[`FieldTheory/Perfect`] Prove equivalences 6 months ago
help wanted algebra
SnirBroshi/mathlib4
1

The math library of Lean 4

[`SimpleGraph/Prod`] Define the tensor product 6 months ago
help wanted graph-theory
SnirBroshi/mathlib4
1

The math library of Lean 4

[`SimpleGraph`] Hadwiger-Nelson problem 6 months ago
help wanted graph-theory
SnirBroshi/mathlib4
1

The math library of Lean 4

[`SimpleGraph`] Mycielskian 6 months ago
help wanted graph-theory
SnirBroshi/mathlib4
1

The math library of Lean 4

[`SimpleGraph`] Dominating sets and domination number 6 months ago
help wanted graph-theory
SnirBroshi/mathlib4
1

The math library of Lean 4

[`SimpleGraph`] Perfect graphs 6 months ago
help wanted graph-theory
SnirBroshi/mathlib4
1

The math library of Lean 4

[`SimpleGraph/ConcreteColorings`] `(cycleGraph <| 2 * k + 1)ᶜ.chromaticNumber = k + 1` 6 months ago
help wanted graph-theory
SnirBroshi/mathlib4
1

The math library of Lean 4

[`SimpleGraph`] Paths and incidence sets / degrees 6 months ago
help wanted graph-theory
SnirBroshi/mathlib4
1

The math library of Lean 4

[`NumberTheory/Complex`] `re`/`im`/`star` are algebraic 6 months ago
help wanted
SnirBroshi/mathlib4
1

The math library of Lean 4

Hermite's identity 6 months ago
help wanted
SnirBroshi/mathlib4
1

The math library of Lean 4

[`Analysis/Arctan`] `StrictMono (x - Real.arctan x)` 6 months ago
help wanted analysis
SnirBroshi/mathlib4
1

The math library of Lean 4

[`SimpleGraph`] Longest paths in acyclic graphs are between leaves 6 months ago
help wanted graph-theory
SnirBroshi/mathlib4
1

The math library of Lean 4

[`SimpleGraph/Walks/Operations`] `take` and `drop` 6 months ago
help wanted graph-theory
SnirBroshi/mathlib4
1

The math library of Lean 4

[`SimpleGraph`] Existence of paths of length `edist` / `eccent` / `ediam` / `radius` 6 months ago
help wanted graph-theory
SnirBroshi/mathlib4
1

The math library of Lean 4

[`SimpleGraph`] Longest path iff length equals diameter / eccentricity 6 months ago
help wanted graph-theory
SnirBroshi/mathlib4
1

The math library of Lean 4

[`SimpleGraph`] Shortest walks are paths 6 months ago
help wanted graph-theory
SnirBroshi/mathlib4
1

The math library of Lean 4

[`SimpleGraph`] Calculating the diameter 6 months ago
help wanted graph-theory
SnirBroshi/mathlib4
1

The math library of Lean 4

[`SimpleGraph/Connectivity/Connected`] Change `connected_delete_edge_of_not_isBridge` to only require `Preconnected` 6 months ago
help wanted graph-theory
SnirBroshi/mathlib4
1

The math library of Lean 4

[`SimpleGraph/Connectivity/WalkDecomp`] `reverse` / `takeUntil` / `dropUntil` 6 months ago
help wanted graph-theory
SnirBroshi/mathlib4
1

The math library of Lean 4

Deprecate `Order.Preimage` and `InvImage` in favor of `Function.onFun` 6 months ago
help wanted
SnirBroshi/mathlib4
1

The math library of Lean 4

[Topology] Rename `ZerothHomotopy` to `PathConnectedComponent` 6 months ago
help wanted topology
SnirBroshi/mathlib4
1

The math library of Lean 4