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Commits on Aug 12, 2026

• docs: improve README (#74)

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Commits on Jul 31, 2026

• Update toolchain and remove direct mathlib dependency (#73)

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Commits on Jul 26, 2026

• remove needless comment

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• Merge branch 'ex-48-fixed'

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• Exercise 4.8 - changed example to theorem

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Commits on Jul 25, 2026

• Merge branch 'ex-41-fixed'

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• refactor(chapter3): drop splitInTwoSL from simp

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• refactor(chapter4): rework Ex 4.1 to follow the statement faithfully

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Commits on Jul 23, 2026

• Exercise 4.8 solved

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• Exercise 4.1 solved

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• refactor(chapter3): RAList namespace

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• review changes

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Commits on Jul 21, 2026

• Exercise 3.10 solved (#66)

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• chapter3: fix order of definitions

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Commits on Jul 10, 2026

• docs(chapter1): document foldl fusion law in Exercise 1.18

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Commits on Jul 9, 2026

• refactor(chapter1): simplify Exercise 1.17 fusion proofs

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• Exercise 1.17 solved (#65)

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Commits on Jul 8, 2026

• feat(chapter3): prove dropWhileSL, initsSL and inits₁ = inits₂

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Commits on Jul 7, 2026

• feat(chapter3): prove SymList lemmas and refactor concat time bounds

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Commits on Jun 23, 2026

• feat(chapter2): add TimeM complexity proofs for concat₁ and concat₂

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Commits on Jun 16, 2026

• chore: remove assignment files and simplify termination proofs

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Commits on Jun 15, 2026

• fix(chapter1): simplify proofs and move inits/tails to Chapter1-Ex

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• feat(chapter1): add termination proofs and collapse equivalence

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Commits on Jun 11, 2026

• fix: solve perms1 and perms2 in chapter1

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Commits on Dec 17, 2025

• chore: upgrade to Lean v4.27.0-rc1

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Commits on Dec 10, 2025

• fix: minor syntax adjustment

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• fix: minor syntax adjustment

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• fix(chapter4): complete flatten proof (#62)

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• feat(chapter5): prove reverse equivalence (#64)

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Commits on Dec 3, 2025

• fix(chapter1): complete scanr proof in Ex 1.12.

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• test(chapter3): improve fetch function examples

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Commits on Nov 14, 2025

• fix README

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• update README

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Commits on Nov 13, 2025

• fix : lakefile.toml default target

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• update workflow

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