The structure group of a non-degenerate effect algebra

被引:0
作者
Carsten Dietzel
Wolfgang Rump
机构
[1] University of Stuttgart,Institute for Algebra and Number Theory
来源
Algebra universalis | 2020年 / 81卷
关键词
Effect algebra; L-algebra; Structure group; Self-similarity; Group-valued measure; 08A55; 81P10; 06F15; 46L51;
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摘要
A (non-commutative) structure group G(E) is associated to an arbitrary effect algebra E, and a concept of non-degeneracy is introduced. If E is non-degenerate, G(E) has a right invariant partial order, E embeds as an interval into G(E), and the negative cone of G(E) is a self-similar partial L-algebra. In the degenerate case, the possible anomalies are explained. Lattice effect algebras, 2-divisible effect algebras, and the effect algebra of a Hilbert space, are shown to be non-degenerate. As an application, using a strengthened concept of sharpness, the theory of block decomposition is extended to arbitrary effect algebras, and it is shown that the “very sharp” elements always form a sub-effect algebra and an orthomodular poset.
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