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math.OA2003★ 18 cited
Sequential isomorphisms between the sets of von Neumann algebra effects
Lajos Molnar
In this paper we describe the structure of all sequential isomorphisms between the sets of von Neumann algebra effects. It turns out that if the underlying algebras have no commuta…
math.OA2003
Linear maps on the space of all bounded observables preserving maximal deviation
L. Molnar, M. Barczy
In this paper we determine all the bijective linear maps on the space of bounded observables which preserve a fixed moment or the variance. Nonlinear versions of the corresponding…