Some remarks on autoequivalences of categories

Details Some remarks on autoequivalences of categories Some remarks on autoequivalences of categories

2004-03-23

arxiv.org/abs/math/0403394v1

Mathematics

General Mathematics

9 pages

Scientific paper

Prof. Boris I. Plotkin [arXiv:math.GM/0210194, arXiv:math.GM/0204245] drew attention to the question when an equivalence between two categories is isomorphic as a functor to an isomorphism between them. It turns out that it is quite important for universal algebraical geometry and concerns mainly the categories $\Theta \sp 0 (X) $ of free universal algebras of some variety $\Theta $ free generated by finite subsets of $X$. In the paper, a complete answer to the Plotkin's question is given: there are no proper autoequivalences of the category $\Theta \sp 0 (X) $. Also some connected problems are discussed.

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