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General Preservers of Quasi-Commutativity |
Canad. J. Math. 62(2010), 758-786
Published:2010-05-20
Printed: Aug 2010
Printed: Aug 2010
- Gregor Dolinar,
- Bojan Kuzma,
Abstract
Let ${ M}_n$ be the algebra of all $n \times n$ matrices over $\mathbb{C}$. We say that $A, B \in { M}_n$ quasi-commute if there exists a nonzero $\xi \in \mathbb{C}$ such that $AB = \xi BA$. In the paper we classify bijective not necessarily linear maps $\Phi \colon M_n \to M_n$ which preserve quasi-commutativity in both directions.
| Keywords: | general preservers, matrix algebra, quasi-commutativity |
| MSC Classifications: |
15A04 - Linear transformations, semilinear transformations 15A27 - Commutativity 06A99 - None of the above, but in this section |