Results 71 to 80 of about 259 (129)
The Structure of Endomorphism Monoids in Conjugate Categories
, 2009 We invoke structure theorems from the theory of semigroups to analyze the anatomy of categories arising from a type of conjugation by a subcategory. The equivalence classes of Green’s H-relation admit group structures when they contain idempotents, and ...
Helmstutler, Randall D. +1 more
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Generating uncountable transformation semigroups
, 2010 We consider naturally occurring, uncountable transformation semigroups S and investigate the following three questions. (i) Is every countable subset F of S also a subset of a finitely generated subsemigroup of S?
Péresse, Yann
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Covariant Schrödinger Semigroups on Riemannian Manifolds [electronic resource] /
This monograph discusses covariant Schrödinger operators and their heat semigroups on noncompact Riemannian manifolds and aims to fill a gap in the literature, given the fact that the existing literature on Schrödinger operators has mainly focused on ...
Güneysu, Batu.author.authttp://id.loc.gov/vocabulary/relators/aut +1 more
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Generating uncountable transformation semigroups
, 2009 We consider naturally occurring, uncountable transformation semigroups S and investigate the following three questions. (i) Is every countable subset F of S also a subset of a finitely generated subsemigroup of S?
Péresse, Yann +2 more
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Unbounded generators of dynamical semigroups
The time evolution of a closed quantum system was described quite early in the history of quantum physics. These dynamics are reversible, and the time evolution is implemented by a continuous unitary group, which is in turn generated by a selfadjoint ...
Siemon, Inken
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, 2015 We construct a free abelian dimonoid and describe the least abelian congruence on a free dimonoid.
Zhuchok, Y.
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ON EXTENDABILITY OF ENDOMORPHISMS AND OF E_0-SEMIGROUPS ON FACTORS
, 2014 We examine what it means to say that certain endomorphisms of a factor (which we call equi-modular) are extendable. We obtain several conditions on an equi-modular endomorphism, and single out one of them with a purely ‘subfactor flavour’ as a theorem ...
泉, 正己 +4 more
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L-, R- and H -cross-sections in the strong endomorphism semigroup of the undirected graphs
, 2013 В статье показано, что моноид сильных эндоморфизмов конечного неориентированного графа без кратных ребер содержит единственное с точностью до изоморфизма R-сечение. Найдены необходимые и достаточные условия существования H -сечениий и построены примеры L-
Бондарь, Е.А.
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UNITAL DILATIONS OF COMPLETELY POSITIVE SEMIGROUPS
, 2013 Semigroups of completely positive maps arise naturally both in noncommu-tative stochastic processes and in the dynamics of open quantum systems. Since its inception in the 1970’s, the study of completely positive semigroups has included among its central
David J. Gaebler
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