Lean 4 fork for HoTT-compatible kernel extensions (Path types, transport, HITs). Maintained against upstream leanprover/lean4.
6e1c9653d9
This is used to uniquely identify InteractiveGoals and InteractiveHypotheses. This makes it easier to do contextual suggestions: eg the infoview can send a message saying "the user clicked on subexpression 5 in hypothesis N in goal G" where N and G are unique identifiers for a goal rather than pretty names which may be non-unique or indices which may be difficult to compute (eg in infoview there is a mode where hypotheses are reversed or filtered). While adding these I also refactored the InteractiveGoal generating function. I unwrapped a fold in to a for/in loop with mutating variables which is a little easier to read. |
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This is the repository for Lean 4, which is currently being released as milestone releases towards a first stable release. Lean 3 is still the latest stable release.
About
- Quickstart
- Homepage
- Theorem Proving Tutorial
- Functional Programming in Lean first chapter is available!
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Installation
See Setting Up Lean.
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Please read our Contribution Guidelines first.
Building from Source
See Building Lean.