Developed in the LogiCal project, the Coq tool is a formal proof
management system: a proof done with Coq is mechanically checked
by the machine.
In particular, Coq allows:
* the definition of functions or predicates,
* to state mathematical theorems and software specifications,
* to develop interactively formal proofs of these theorems,
* to check these proofs by a small certification "kernel".
Coq is based on a logical framework called "Calculus of Inductive
Constructions" extended by a modular development system for