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The canonical Homotopy Type Theory informal textbook, initiated at the Institute for Advanced Study (2012–13) under the Univalent Foundations project. It presents the theory pedagogically without requiring technical proof assistant use.

Features

Comprehensive introduction to homotopy type theory and univalence
Emphasis on intuition and mathematical reasoning without proof assistants
Part of a broader univalent foundations initiative
Distributed under CC‑BY‑SA 3.0 license
Contributions accepted via PRs and GitHub issues
Nightly builds and compiled versions available online

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Additional Project Details

Programming Language

Python

Related Categories

Python Mathematics Software

Registered

2025-08-06

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A textbook on informal homotopy type theory

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