paper

On the semigroup of square matrices

arXiv:math/0510624

Abstract

We study the structure of nilpotent subsemigroups in the semigroup of all matrices over a field, , with respect to the operation of the usual matrix multiplication. We describe the maximal subsemigroups among the nilpotent subsemigroups of a fixed nilpotency degree and classify them up to isomorphism. We also describe isolated and completely isolated subsemigroups and conjugated elements in .

A revised version of the preprint: A. Kudryavtseva, V. Mazorchuk, Square matrices as a semigroup, Preprint 2002:18, Uppsala University

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