# AxiomMath/CFSG

> A sorry-free Lean 4 formalization of the Classification of Finite Simple Groups (CFSG), built on Mathlib and TauCeti using standard axioms. Aimed at mathematicians and formal proof developers.

- Magnitude: 5.7 out of 10 — Early signal
- Stars: 122 total · +7 stars measured 2026-10-28, 12:52–15:55 UTC, ≈ 20 by evening
- Star trust: star growth looks organic
- Category: Science & research · Language: Lean · License: Apache-2.0 · Created: 2026-10-27 · Last push: 2026-10-27
- GitHub: https://github.com/AxiomMath/CFSG · Homepage: https://cfsg.axiommath.ai · Page: https://gitnova.dev/en/r/AxiomMath/CFSG

## Useful for

- Verify the formal CFSG proof by running lake build
- Study the Lean 4 formalization of the classification of finite simple groups
- Reuse the CFSG statement from TauCeti in your own Lean projects

## Why it’s here

- Star-counter measurements on 2026-10-28 (UTC), 12:52–15:55: 115 → 122 stars (+7). This is the change over that interval.
- Estimated end-of-day forecast: about +20 stars, using observed gains and the previous day.
- The repository is 1 day old and already has 122 stars. With less than two weeks of history, there's no usual pace to compare the spike against yet.
- Top new repositories this week: #188.
- Hacker News: “Classification of Finite Simple Groups Formalized in Lean” — 232 points, 23 h ago.
- About 15 forks a day — people are taking the code.

## Star trust

Star growth looks organic.

Star-trust labels are heuristics based on the repository’s behavior, not a check of every stargazer.

## Numbers

- Forks: 15
- Issues and pull requests: 0
- Watchers: 2
- Average over the last week: 58 per day
- Usual pace: too little history (under two weeks)
- Stars in the last hour (measured): 4

## Stars per day, last 2 days (oldest → newest, today is partial)

2026-10-27 … 2026-10-28: 97, 7

## Hacker News

- Classification of Finite Simple Groups Formalized in Lean — 232 points, 72 comments: https://news.ycombinator.com/item?id=50261647

## Spotted in now

- Top new repositories this week: #188

## Similar by description

1. **openai/math** — 5.5 · Breakout · Science & research · Lean · +346 stars measured 2026-10-28, 00:02–15:55 UTC, ≈ 493 by evening
   A collection of mathematical manuscripts and Lean formalizations produced by an internal OpenAI model while solving open research problems. Intended for mathematicians and researchers studying the results and verifying proofs.
   Full card: https://gitnova.dev/en/r/openai/math.md

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Magnitude (0–10) measures how fast and how unusually interest in a repository is growing right now. It is not a quality score.
Days are UTC. “So far today” is a fact; “expected by the end of the day” is a forecast.
Summaries and use cases are written by an LLM (DeepSeek V4.1 Flash) from the README and may be inaccurate: verify specific claims (benchmarks, speed, hardware) in the repository itself.
Data as of 2026-10-28 16:10 UTC, updated every 30 minutes.