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leanprover-community/mathlib4

The math library of Lean 4

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 (3,405 stars)
Forks
 (1,381 forks)
Indexed issues
 (16 indexed issues)
open beginner issues
 (0 open beginner issues)
Latest indexed
Jul 27, 2026
Last GitHub push
Jun 7, 2026
License
Apache License 2.0
Contributing guide
Contributing guide
Code of conduct
Code of conduct
Dominant language
Lean
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Beginner labels
No beginner labels indexed

Issues

16 indexed issues

Open
Tracking Issue: Digraph Targets
good first issuet-combinatorics
Why recommendedHas a beginner-friendly label · Contributing guide available
Has a beginner-friendly labelContributing guide available

leanprover-community / mathlib4 · #26771 · Jul 5, 2025 · Lean · 3,405 stars

7 comments1 reaction2 assignees
Open
Sperner's lemma
good first issuet-analysist-combinatorics
Why recommendedNo assignee yet · Has a beginner-friendly label
No assignee yetHas a beginner-friendly labelContributing guide available

leanprover-community / mathlib4 · #25231 · May 27, 2025 · Lean · 3,405 stars

16 comments0 reactions0 assignees
Open
Tracking Issue: Naming consistency
good first issuehelp-wantedplease-adopt
Why recommendedNo assignee yet · Has a beginner-friendly label
No assignee yetHas a beginner-friendly labelContributing guide available

leanprover-community / mathlib4 · #21584 · Feb 8, 2025 · Lean · 3,405 stars

5 comments2 reactions0 assignees
Open
Define the Hodge star operator
enhancementgood first issuehelp-wantedt-algebra
Why recommendedHas a beginner-friendly label · Contributing guide available
Has a beginner-friendly labelContributing guide available

leanprover-community / mathlib4 · #17722 · Oct 14, 2024 · Lean · 3,405 stars

2 comments3 reactions1 assignee
Open
The Shapley-Folkman lemma
good first issuet-analysis
Why recommendedHas a beginner-friendly label · Contributing guide available
Has a beginner-friendly labelContributing guide available

leanprover-community / mathlib4 · #14427 · Jul 4, 2024 · Lean · 3,405 stars

8 comments1 reaction1 assignee
Open
Rename `rpow_le_rpow`
good first issueplease-adopt
Why recommendedNo assignee yet · Has a beginner-friendly label
No assignee yetHas a beginner-friendly labelContributing guide available

leanprover-community / mathlib4 · #13544 · Jun 5, 2024 · Lean · 3,405 stars

4 comments0 reactions0 assignees
Open
Small TODOs to do!
good first issue
Why recommendedNo assignee yet · Has a beginner-friendly label
No assignee yetHas a beginner-friendly labelContributing guide available

leanprover-community / mathlib4 · #7987 · Oct 27, 2023 · Lean · 3,405 stars

7 comments7 reactions0 assignees