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Mathematical Structures in Computer Science (2002), 12: 565-578 Cambridge University Press
Copyright © 2002 Cambridge University Press
doi:10.1017/S0960129501003590
Published online by Cambridge University Press 21 Oct 2002


Coalgebras of bounded type


H. PETER GUMM a1 and TOBIAS SCHRÖDER a1
a1 Philipps-Universität Marburg, 35032 Marburg, Germany Email: gumm@mathematik.uni-marburg.de, tschroed@mathematik.uni-marburg.de

Abstract

We use some results of Trnková to show first that subcoalgebras are always closed under finite intersections. Assuming that the type functor F is bounded, we obtain a concrete representation of the terminal F-coalgebra. We also provide several equivalent characterizations of boundedness.

(Received December 7 2000)
(Revised August 8 2001)



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