Lambdapi is a proof assistant based on the λΠ-calculus modulo rewriting, mostly compatible with the proof checker Dedukti. More details are given in the documentation.

opam install lambdapi

Lambdapi requires a Unix-like system. It should work on Linux as well as on MacOS. It might also be possible to make it work on Windows with Cygwyn or with "bash on Windows".

List of dependencies:

• GNU make
• ocaml >= 4.04.1
• dune >= 1.2.0
• odoc (for documentation only)
• bindlib >= 5.0.0
• earley >= 2.0.0
• timed >= 1.0
• menhir
• yojson >= 1.6.0
• cmdliner
• ppx_inline_test

Using Opam, a suitable OCaml environment can be setup as follows.

opam switch 4.05.0
eval `opam config env`
opam install dune odoc menhir yojson cmdliner bindlib.5.0.0 timed.1.0 earley.2.0.0 ppx_inline_test

To compile Lambdapi, just run the command make in the source directory. This produces the _build/install/default/bin/lambdapi binary, which can be run on files with the .dk or .lp extension (use the --help option for more information).

make               # Build lambdapi.
make doc           # Build the documentation.
make install       # Install the program.
make install_vim   # Install vim support.
make install_emacs # Install emacs (>= 26.1) support (needs the eglot package)

Note: you can run lambdapi without installing with dune exec -- lambdapi.

The following commands can be used for cleaning up the repository:

make clean     # Removes files generated by OCaml.
make distclean # Same as clean, but also removes library checking files.
make fullclean # Same as distclean, but also removes downloaded libraries.