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trepplein: a Lean type-checker

Lean is an interactive theorem prover based on dependent type theory. For additional trust, Lean can export the generated proofs so that they can be independently verified. Trepplein is a tool that can check these exported proofs.

Trepplein is written in Scala, and requires SBT to build.

sbt stage
./target/universal/stage/bin/trepplein .../export.out

Other checkers

  • tc, a type-checker written in Haskell.
  • leanchecker, a bare-bones version of the Lean kernel.