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math.OA1998
Some linear preserver problems on B(H) concerning rank and corank
Lajos Molnar
As a continuation of the work on linear maps between operator algebras which preserve certain subsets of operators with finite rank, or corank, here we consider the problem inbetwe…
math.OA1998
An algebraic approach to Wigner's unitary-antiunitary theorem
Lajos Molnar
We present an operator algebraic approach to Wigner's unitary-antiunitary theorem using some classical results from ring theory. To show how effective this approach is, we prove a…