On Segal entropy
Abstract
The paper is devoted to the investigation of Segal's entropy in semifinite von Neumann algebras. The following questions are dealt with: semicontinuity, the 'ideallike' structure of the linear span of the set of operators with finite entropy, and topological properties of the set of operators with finite as well as infinite entropy. In our analysis, full generality is aimed at, in particular, the operators for which the entropy is considered are not assumed to belong to the underlying von Neumann algebra, instead, they are arbitrary positive elements in the space $L^1$ over the algebra.
 Publication:

arXiv eprints
 Pub Date:
 February 2024
 DOI:
 10.48550/arXiv.2402.11067
 arXiv:
 arXiv:2402.11067
 Bibcode:
 2024arXiv240211067L
 Keywords:

 Mathematics  Operator Algebras;
 46L53 (Primary);
 81P45;
 62B15 (Secondary)