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Utabcert is a Coq formalization of equivalence and containment results obtained by Sagiv and Yannakakis (Equivalence Among Relational Expressions with the Union and Difference Operators).

This is a formalisation of Wim Ruitenburg's paper "On the Period of Sequences (An(p)) in Intuitionistic Propositional Calculus" (JSL 1984).

Transform bounded self-reference into plain owl files

The Episciences Remote Control tool for episciences journals like LMCS

The Coalgebraic Partition Refiner

A generic reasoner for modal and hybrid logics; it can be instantiated to any modal or hybrid logic admitting an axiomatization in terms of so-called rank-1 rules or axioms