A class of preservers on Hilbert space effects including ortho-order automorphisms and sequential automorphisms

Details A class of preservers on Hilbert space effects including ortho-order automorphisms and sequential automorphisms A class of preservers on Hilbert space effects including ortho-order automorphisms and sequential automorphisms

2002-12-05

arxiv.org/abs/math/0212079v1

Mathematics

Functional Analysis

22 pages, submitted for publication

Scientific paper

In this paper we study a new class of transformations on the set of all Hilbert space effects. This consists of the bijective maps which preserve the order and zero product in both directions. The main result of the paper gives a complete description of the structure of those transformations. As applications we obtain additional new results and some former ones as easy corollaries. In particular, we obtain the form of the ortho-order automorphisms as well as that of the sequential automorphisms. In the last paragraph of the paper we show that these two kinds of automorphisms belong to our class of transformations even when their domain is the set of all effects in a general von Neumann algebra.

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