Maurice Kianpi

Laboratory of Algebra, Geometry and Applications, Department of Mathematics, Faculty of Science, University of Yaounde 1, P.O. Box 812, Yaounde, Republic of Cameroon.

[ 1 ] - On descent for coalgebras and type transformations

We find a criterion for a morphism of coalgebras over a Barr-exact category to be effective descent and determine (effective) descent morphisms for coalgebras over toposes in some cases. Also, we study some exactness properties of endofunctors of arbitrary categories in connection with natural transformations between them as well as those of functors that these transformations induce between co...

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