Lean 4 fork for HoTT-compatible kernel extensions (Path types, transport, HITs). Maintained against upstream leanprover/lean4.
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This PR takes a more principled approach in deriving `String` pattern lemmas by reducing to simpler cases similar to how the instances are defined. This reduces duplication of complex arguments (at the expense of having to state more simple lemmas; however these lemmas are useful to users as well). |
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This is the repository for Lean 4.
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