lean4

Experimental tree-sitter parser for the Lean (4) Theorem Prover

Theorem Proving in Lean 4 日本語訳

Static human-facing explorer for the Palomar database

Type Lean unicode characters in your web browser

A visual navigator for Lean 4 declarations, starting with Mathlib. Every declaration: statement, docstring, what it uses, what uses it, the axioms it rests on, re-checked by Tenet.

What the gradient is doing: a Taylor expansion you can drag around, proved in core Lean, with a Lean Studio widget

A verifiable network for personally delegated formal mathematics research.

Sovereign LISP machine. EmojiScript bytecode, LTMS, Lean 4.

An educational test bed: classical number theory written in Lean 4, run in the browser through lean-vir, checked against independent references and benchmarked against native Lean and hand-written JavaScript.

Strict checker for dsh: verify code and commands with real checkers - Lean 4 kernel checking, language compilers, and harness-shell hazard rules.

Jacobian matrix formalization. 79 theorems, interactive playground.

Enforce strict checks as dsh harness policy: repeated-failure intervention, a glob-protected critical-path gate that blocks with diagnostics, and an automatic post-write check.

未完の日本語訳です．TPiL の日本語訳をお探しの方は https://aconite-ac.github.io/theorem_proving_in_lean4_ja/ へどうぞ

Defense grade Differential Privacy kernel and live network topology map designed for Critical Energy Infrastructure Protection (CIP) using Rust and Lean 4 constraints.

Evidence-gated frontier mathematics research workflow for DeepSeek Harness

Reproducible notes on Erdos problems 617, 835, 1221, and 550: partial results, statement corrections, and Lean proof audits.

Founder and CEO, SZL Holdings - governed AI infrastructure with inspectable source, runtime state, receipts, and proof boundaries.

Do these observations carry enough to justify the claim? A witness-refinement analyzer that returns PASS, or a concrete collision proving the field set is insufficient. Part of the Seal family.

Formal compliance evaluation and cryptographically signed certification with independent verification.

Executable assurance kit for the seal mediation kernels: finite oracles and CLIs that turn the Lean 4 proofs into runnable, reviewer-checkable evidence.