package lambdapi

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

>>>>> User Manual <<<<<

Issues can be reported on the following issue tracker.

Questions can be asked on the following forum.

Examples of developments made with Lambdapi:

• Logic definitions installed with Lambdapi

• library on natural numbers and polymorphic lists

• inductive-recursive type definition

• inductive-inductive type definition

• tests/OK directory (used for testing and continuous integration)

Operating systems

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

Installation via Opam

Lambdapi is under active development. A new version of the lambdapi Opam package will be released soon. For now, we advise to pin the development repository to get the latest development version:

opam pin add lambdapi https://github.com/Deducteam/lambdapi.git
opam install lambdapi # install emacs and vim support as well

The VSCode extension is available on the Marketplace.

The installation gives you:

• a main executable lambdapi in your PATH

• OCaml libraries

• a lambdapi mode for vim

• a lambdapi mode for emacs

To browse the source code documentation, you can do:

opam install odig
odig doc lambdapi

Compilation from the sources

You can get the sources using git as follows:

git clone https://github.com/Deducteam/lambdapi.git

Dependencies are described in lambdapi.opam. The command why3 config detect must be run to make Why3 know the available provers.

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

opam install dune bindlib timed sedlex menhir pratter yojson cmdliner why3 alcotest alt-ergo odoc
why3 config detect

To compile Lambdapi, just run the command make in the source directory. This produces the _build/install/default/bin/lambdapi binary. Use the --help option for more information. Other make targets are:

make                        # Build lambdapi
make doc                    # Build the user documentation (avalaible on readthedocs)
make odoc                   # Build the developer documentation
make install                # Install lambdapi
make install_emacs          # Install emacs mode
make install_vscode         # Install vscode extension
make install_vim            # Install vim support

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

For running tests, one also needs alcotest and alt-ergo.

For building the source code documentation, one needs odoc. The starting file of the source code html documentation is _build/default/_doc/_html/lambdapi/index.html.

For building the User Manual, see doc/README.md.

The following commands can be used to clean 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.