Homotopy Type Theory in Lean

22 Apr 2017  ·  Floris van Doorn, Jakob von Raumer, Ulrik Buchholtz ·

We discuss the homotopy type theory library in the Lean proof assistant. The library is especially geared toward synthetic homotopy theory. Of particular interest is the use of just a few primitive notions of higher inductive types, namely quotients and truncations, and the use of cubical methods.

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Logic in Computer Science Logic 03B70, 03B15, 55U35

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