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On coalgebra based on classes

J. Adamek, S. Milius, J. Velebil

cs.LOarXiv:cs/0306118

Abstract

Every endofunctor of the category of classes is proved to be set-based in the sense of Aczel and Mendler, therefore, it has a final coalgebra. Other basic properties of these endofunctors are proved, e.g. the existence of a free completely iterative theory.

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