Terminal semantics for codata types in intensional Martin-Löf type theory

preprint2014arXivOpen access

Abstract

In this work, we study the notions of relative comonad and comodule over a relative comonad, and use these notions to give a terminal coalgebra semantics for the coinductive type families of streams and of infinite triangular matrices, respectively, in intensional Martin-Löf type theory. Our results are mechanized in the proof assistant Coq.

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