a1 Institute of Mathematics, Lajos Kossuth University, 4010 Debrecen, P.O.Box 12, Hungary e-mail: email@example.com
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 generalization of this celebrated theorem for Hilbert modules over matrix algebras. We also present a Wigner-type result for maps on prime C*-algebras.
(Received February 17 1998)
(Revised August 13 1998)
1991 Mathematics subject classification (Amer. Math. Soc.)
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