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Companions, Causality and Codensity

Damien Pous ; Jurriaan Rot.

In the context of abstract coinduction in complete lattices, the notion of compatible function makes it possible to introduce enhancements of the coinduction proof principle. The largest compatible function, called the companion, subsumes most enhancements and has been proved to enjoy many good&nbsp;[&hellip;]

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Expressive Logics for Coinductive Predicates

Clemens Kupke ; Jurriaan Rot.

The classical Hennessy-Milner theorem says that two states of an image-finite transition system are bisimilar if and only if they satisfy the same formulas in a certain modal logic. In this paper we study this type of result in a general context, moving from transition systems to coalgebras and from&nbsp;[&hellip;]

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