# stormj-UH/spivak-lean

> Lean 4 formalization of Michael Spivak's Calculus: every theorem and problem of all 30 chapters and 9 appendices in the 3rd and 4th editions, with corrections to errors in the book.

- Magnitude: 1.3 out of 10 — Quiet
- Stars: 2 total · +0 stars today, ≈ 2 by evening
- Star trust: star growth looks organic
- Category: Learning & lists · Language: Lean · License: Apache-2.0 · Created: 2026-09-26 · Last push: 2026-09-26
- GitHub: https://github.com/stormj-UH/spivak-lean · Page: https://gitnova.dev/en/r/stormj-UH/spivak-lean

## Useful for

- Study the Lean 4 formalization of calculus chapter by chapter alongside Spivak
- Check Lean proofs of the book's theorems and problems with no sorry or axiom
- Find corrections to errors in the 3rd and 4th editions by grepping 'Correction to Spivak'

## Why it’s here

- 0 stars so far today, about 2 expected by the end of the day.
- The repository is 1 day old and already has 2 stars. With less than two weeks of history, there's no usual pace to compare the spike against yet.
- Hacker News: “Show HN: Spivak's Calculus formalized in Lean 4 – every theorem, every problem” — 12 points, 8 h ago.

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

## Stars per day, last 8 days (oldest → newest, today is partial)

2026-09-20 … 2026-09-27: 0, 0, 0, 0, 0, 0, 2, 0

## Hacker News

- Show HN: Spivak's Calculus formalized in Lean 4 – every theorem, every problem — 12 points, 2 comments: https://news.ycombinator.com/item?id=49858409

## Spotted in now

- Spotted on Hacker News

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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 2026-09-27 01:40 UTC, updated every 30 minutes.