stormj-UH/spivak-lean
Michael Spivak's Calculus formalized in Lean 4: every theorem and every problem of all 30 chapters and 9 appendices, in both the 3rd and 4th editions
About the project
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.
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'
README summarized by DeepSeek V4.1 Flash. Details may be inaccurate.
Why it’s trending
- 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” — 10 points, 7 h ago.
Stars per day
Bars are daily stars, the line is the usual pace. Red marks spike days.
Numbers
- Total stars
- 2
- Today
- 0 · ≈ 2 by evening
- Forks
- 0
- Issues and pull requests
- 0
- Watchers
- 0
- Language
- Lean
- License
- Apache-2.0
- Created
- September 26, 2026
- Last push
- September 26, 2026
Star trust
Growth looks organic: forks and discussion are in line with active projects, and stars arrive unevenly, the way people give them.
These are heuristics, not a verdict: we judge by the repository’s behavior, not by a list of stargazers.
Hacker News discussions
- Show HN: Spivak's Calculus formalized in Lean 4 – every theorem, every problem10 points, September 26, 2026
Spotted in
- September 27, 2026Spotted on Hacker News
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