⬢github Lean · 2 ★ · pushed 9 h ago · Apache-2.0
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
A complete Lean 4 formalization of Michael Spivak's classic textbook Calculus, covering every definition, theorem, and problem from all 30 chapters and 9 appendices of both the 3rd and 4th editions. It uses Spivak's own definitions, proves results like the transcendence of e and π (some parts missing from Mathlib are supplied), and documents about sixty statements in the book that are false as printed.
Why now: It was shared on Hacker News as a Show HN post, notable for its completeness and for formally flagging errors in Spivak's printed text — including sixteen answer-section mistakes.
Who it is for: Mathematicians, Lean/MATHLIB users, and educators interested in formalized calculus or the correctness of Spivak's classic text.
Stars over our 17 snapshots: 2 to 2, since 4 h ago.
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