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