Results 41 to 50 of about 108,334 (223)
The discrete fragmentation equations : semigroups, compactness and asynchronous exponential growth [PDF]
, 2012 In this paper we present a class of fragmentation semigroups which are compact in a scale of spaces defined in terms of finite higher moments. We use this compactness result to analyse the long time behaviour of such semigroups and, in particular, to ...
A. C. McBride +19 more
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Representation of Numerical Semigroups by Dyck Paths [PDF]
, 2006 We introduce square diagrams that represent numerical semigroups and we obtain an injection from the set of numerical semigroups into the set of Dyck paths.Comment: Short ...
Bras-Amorós, Maria, de Mier, Anna
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Skew Pairs of Idempotents in Partial Transformation Semigroups
Mathematics, 2021 Let S be a regular semigroup. A pair (e,f) of idempotents of S is said to be a skew pair of idempotents if fe is idempotent, but ef is not. T. S. Blyth and M. H. Almeida (T. S. Blyth and M. H.
Panuwat Luangchaisri, Thawhat Changphas
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Optimal polynomial decay of functions and operator semigroups [PDF]
, 2009 We characterize the polynomial decay of orbits of Hilbert space C0-semigroups in resolvent terms. We also show that results of the same type for general Banach space semigroups and functions obtained recently in Batty and Duyckaerts (J Evol Eq 8:765–780,
A. Borichev, Y. Tomilov
semanticscholar +1 more source
Proceedings of the American Mathematical Society, 1977 A Tarski semigroup is an algebraic system which mirrors a fragment of the additive theory of cardinal numbers. Here we show that any two such systems have the same universal theory. We also give a simple arithmetical necessary and sufficient condition for a universal sentence to hold in a Tarski semigroup.
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Journal of Algebra, 2000 In earlier articles of the first author it was shown how to construct an inverse semigroup from any tiling of Euclidean space. Such semigroups are called tiling semigroups. In the paper a categorical basis for such constructions is given in terms of an appropriate group acting partially and without fixed points on an inverse category associated with ...
Kellendonk, J., Lawson, Mark V.
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Rough semigroups and rough fuzzy semigroups based on fuzzy ideals
Open Mathematics, 2016 In this paper, we firstly introduce a special congruence relation U(μ, t) induced by a fuzzy ideal μ in a semigroup S. Then we define the lower and upper approximations based on a fuzzy ideal in semigroups. We can establish rough semigroups, rough ideals,
Wang Qiumei, Zhan Jianming
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Flows on Classes of Regular Semigroups and Cauchy Categories
Journal of Mathematics, 2019 We consider the structure of the flow monoid for some classes of regular semigroups (which are special case of flows on categories) and for Cauchy categories.
Suha Ahmed Wazzan
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C*-Algebras of algebraic dynamical systems and right LCM semigroups [PDF]
, 2015 We introduce algebraic dynamical systems, which consist of an action of a right LCM semigroup by injective endomorphisms of a group. To each algebraic dynamical system we associate a C*-algebra and describe it as a semigroup C*-algebra.
Nathan Brownlowe +2 more
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Algebras of right ample semigroups
Open Mathematics, 2018 Strict RA semigroups are common generalizations of ample semigroups and inverse semigroups. The aim of this paper is to study algebras of strict RA semigroups.
Guo Junying, Guo Xiaojiang
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