#leanprover
November 7, 2026 at 12:54 PM
Lean 4 challenge 22: Subsequences with different limits imply non-convergence.

jaalonso.github.io/calculemus/e...

#LeanProver #LeanLang #Math #Lean4Challenge
November 10, 2026 at 11:03 AM
Lean 4 challenge 19: Convergent sequences are Cauchy sequences.

jaalonso.github.io/calculemus/e...

#LeanProver #ITP #Math #Lean4Challenge
November 7, 2026 at 8:21 AM
Lean 4 challenge 20: If aₙ → L and M is an upper bound of aₙ, then L ≤ M.

jaalonso.github.io/calculemus/e...

#LeanProver #LeanLang #ITP #Math #Lean4Challenge
November 8, 2026 at 10:51 AM
Reto 23 de Lean 4: La sucesión constante aₙ = L converge a L.

jaalonso.github.io/calculemus/p...

#LeanProver #LeanLang #Matemáticas #RetoLean4
November 11, 2026 at 11:01 AM
The Stacks Project, formalized in Lean.

stacks.axiommath.ai

#LeanProver #ITP #AI4Math
November 7, 2026 at 10:18 AM
Lean 4 challenge 21: Subsequences have the same limit as the sequence.

jaalonso.github.io/calculemus/e...

#LeanProver #LeanLang #ITP #Math #Lean4Challenge
November 9, 2026 at 5:18 PM
Reto 22 de Lean 4: Si una sucesión tiene dos subsucesiones con límites distintos, entonces la sucesión no es convergente.

jaalonso.github.io/calculemus/p...
#LeanProver #LeanLang #Matemáticas #RetoLean4
November 10, 2026 at 11:00 AM
Natural Lean: A controlled natural language syntax for Lean.

github.com/medovina/nat...

#LeanProver #LeanLang #ITP
GitHub - medovina/natural_lean: A controlled natural language syntax for Lean.
A controlled natural language syntax for Lean. Contribute to medovina/natural_lean development by creating an account on GitHub.
github.com
November 9, 2026 at 5:47 PM
Lean 4 challenge 18: Convergence of the product of convergent sequences.

jaalonso.github.io/calculemus/e...

#LeanProver #ITP #Math #Lean4Challenge
November 6, 2026 at 8:16 AM
Lean 4 challenge 23: The constant sequence aₙ = L converges to L.

jaalonso.github.io/calculemus/e...

#LeanProver #LeanLang #Math #Lean4Challenge
November 11, 2026 at 11:03 AM
Lean 4 challenge 17: Convergent sequences are bounded.

jaalonso.github.io/calculemus/e...

#LeanProver #ITP #Math #Lean4Challenge
November 5, 2026 at 12:04 PM
Lean 4 challenge 16: For every n ∈ N, n(n+1)(2n+1) is divisible by 6.

jaalonso.github.io/calculemus/e...

#LeanProver #ITP #Math #Lean4Challenge
November 4, 2026 at 7:51 AM
Kaplansky's conjectures fail for torsion-free hyperbolic groups in positive characteristic. ~ Nidhal Mghirbi, Seth Douglas.

arxiv.org/abs/2611.04599

#LeanProver #ITP #AI4Math
Kaplansky's conjectures fail for torsion-free hyperbolic groups in positive characteristic
Do Kaplansky's group-ring conjectures hold for torsion-free word-hyperbolic groups? We show that all four fail in positive characteristic. For every prime $p$ there is a finitely presented, torsion-fr...
arxiv.org
November 7, 2026 at 10:21 AM
LEAN auto closing PRs from unknown contributors due to amount of LLM slop they are receiving: github.com/leanprover/l...

#AI
November 6, 2026 at 12:00 AM
Lean 4 challenge 25 solutions: If the interleaving of two sequences converges to L, then both converge to L.

jaalonso.github.io/calculemus/e...

#LeanProver #ITP #Math #Lean4Challenge
November 2, 2026 at 11:08 AM
Lean 4 challenge 15: There exists k ∈ ℕ such that, for all n ∈ ℕ, (n + k)² ≤ 2ⁿ⁺ᵏ.

jaalonso.github.io/calculemus/e...

#LeanProver #ITP #Math #Lean4Challenge
November 3, 2026 at 9:54 AM
Lean 4 challenge 26: Product of a sequence with limit zero and a bounded sequence.

jaalonso.github.io/calculemus/e...

#LeanProver #ITP #Math #Lean4Challenge
November 2, 2026 at 11:10 AM
Lean 4 challenge 14: For all n ∈ ℕ, 2n + 9 ≤ 2ⁿ⁺⁴.

jaalonso.github.io/calculemus/e...

#LeanProver #ITP #Math #Lean4Challenge
November 1, 2026 at 9:35 AM