Inverse semigroups in coarse geometry
, 2013 Inverse semigroups provide a natural way to encode combinatorial data from geometric settings. Examples of this occur in both geometry and topology, where the data comes in the form of partial bijections that preserve the topology, and operator algebras,
Finn-Sell, Martin
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Effect Algebras of Positive Self-adjoint Operators Densely Defined on Hilbert Spaces
Acta Polytechnica, 2011 We show that (generalized) effect algebras may be suitable very simple and natural algebraic structures for sets of (unbounded) positive self-adjoint linear operators densely defined on an infinite-dimensional complex Hilbert space.
Z. Riečanová
doaj
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