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README.md

Lambdapi, a proof assistant based on the λΠ-calculus modulo rewriting

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.

Installation via Opam

We will only publish a new version of lambdapi Opam package when the development has reached a more stable test. For now, we advise you to pin the development repository to get the latest bug fixes.

opam pin add lambdapi https://github.com/Deducteam/lambdapi.git

Dependencies and compilation

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 Cygwin or with "bash on Windows".

List of dependencies (for version numbers refer to lambdapi.opam):

Note on OCaml versions: more recent versions of OCaml will be supported soon, once the new parsing technology that we are using has stabilized.

Note on the use of Why3: the command why3 config --detect must be run to update the Why3 configuration when a new prover is installed (including on the first installation of Why3).

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

opam switch 4.07.1
eval `opam config env`
opam install dune odoc menhir yojson cmdliner bindlib.5.0.0 timed.1.0 earley.2.0.0 why3.1.3.1
why3 config --detect

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.

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

Note on Emacs: make install installs the lambdapi-mode, an Emacs major mode for editing lambdapi files in $(opam var share)/emacs/site-lisp. To load the lambdapi-mode automatically when editing *.lp files, add (load "lambdapi-site-file") to your ~/.emacs.d/init.el or ~/.emacs. If lambdapi-mode is not activated when editing a file ending in .lp, read the installation section of the documentation.

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.

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Minimal implementation of the λΠ-calculus modulo

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