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

A Coq formalization of the HM logic of open bisimulations in pi-calculus, developed originally by Frederik Haselmeier’s as a part of his MSc thesis with a specific take on the locally nameless approach (called LN_\pi by Frederik)

CORQUE stands for CORecursive eQUations over Effects. This project contains a Coq formalization of complete Elgot monads, their corecursive extensions and background proofs for the paper Unguarded Recursion on Coinductive Resumptions...

A Coq formalization of "Negative Translations and Normal Modality".

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).

Paul Wild's development of Aarhus ModuRes library

Coq formalization of guarded iteration a la https://www8.cs.fau.de/_media/research:papers:elgot-retract.pdf.

An abortive attempt by Ulrich R. to formalize de Groote's paper