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Author: Jonathan Leech
Publisher: American Mathematical Soc.
ISBN: 0821818570
Category : Mathematics
Languages : en
Pages : 108
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Book Description
In the second paper, the structure of a band of groups is studied by means of the techniques of the first paper.
Author: Jonathan Leech
Publisher: American Mathematical Soc.
ISBN: 0821818570
Category : Mathematics
Languages : en
Pages : 108
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Book Description
In the second paper, the structure of a band of groups is studied by means of the techniques of the first paper.
Author: K. S. S. Nambooripad
Publisher: American Mathematical Soc.
ISBN: 0821822241
Category : Mathematics
Languages : en
Pages : 132
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Book Description
The structure of regular semigroups is studied in full generality. The principal tool used in this is the concept of a (regular) biordered set which abstractly characterizes the set of idempotents of a regular semigroup. The category of inductive groupoids is then defined as the category whose objects are pairs consisting of an ordered groupoid and an order-preserving functor of the chain groupoid of a biordered set whose vertex map is a bijection, and whose morphisms are certain commutative diagrams in the category of ordered groupoids. It is shown by an explicit construction that every regular semigroup can be constructed from an inductive groupoid and that the category of inductive groupoids is equivalent to the category of all regular semigroups. This construction is then applied to obtain the structure of all fundamental regular semigroups and all idempotent generated regular semigroups. The paper ends with a study of biordered sets of some important classes of regular semigroups.
Author: Jonathan Leech
Publisher: American Mathematical Soc.
ISBN: 9780821859230
Category : Mathematics
Languages : en
Pages : 108
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Book Description
Author: Jorge Almeida
Publisher: World Scientific
ISBN: 9814548251
Category :
Languages : en
Pages : 322
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Book Description
The conference was a rare occasion for different schools and perspectives to meet in a single event, bringing together researchers interested in semigroups, automata and languages. The proceedings contain both surveys and research reports, which have been carefully refereed. They should be of value to both mathematicians and computer scientists.
Author: Gracinda M. S. Gomes
Publisher: World Scientific
ISBN: 9789812776884
Category : Mathematics
Languages : en
Pages : 536
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Book Description
The thematic term on OC Semigroups, Algorithms, Automata and LanguagesOCO organized at the International Centre of Mathematics (Coimbra, Portugal) in MayOCoJuly 2001 was the gathering point for researchers working in the field of semigroups, algorithms, automata and languages. These areas were selected considering their huge recent developments, their potential applications, and the motivation from other fields of mathematics and computer science. This proceedings volume is a unique collection of advanced courses and original contributions on semigroups and their connections with logic, automata, languages, group theory, discrete dynamics, topology and complexity. A selection of open problems discussed during the thematic term is also included. Contents: Finite Semigroups: An Introduction to a Unified Theory of Pseudovarieties (J Almeida); On Existence Varieties of Regular Semigroups (K Auinger); Varieties of Languages (M J J Branco); A Short Introduction to Automatic Group Theory (C Choffrut); Some Results on Semigroup-Graded Rings (W D Munn); Profinite Groups and Applications to Finite Semigroups (L Ribes); Dynamics of Finite Semigroups (J Almeida); Finite Semigroups Imposing Tractable Constraints (A Bulatov et al.); On the Efficiency and Deficiency of Rees Matrix Semigroups (C M Campbell et al.); Some Pseudovariety Joins Involving Groups and Locally Trivial Semigroups (J C Costa); Partial Action of Groups on Relational Structures: A Connection Between Model Theory and Profinite Topology (T Coulbois); Some Relatives of Automatic and Hyperbolic Groups (M Hoffmann et al.); A Sampler of a Topological Approach to Inverse Semigroups (B Steinberg); Finite Semigroups and the Logical Description of Regular Languages (H Straubing); Diamonds are Forever: The Variety DA (P Tesson & D Th(r)rien); Decidability Problems in Finite Semigroups (P G Trotter); and other papers. Readership: Researchers, academics and graduate students in pure mathematics and computer science."
Author: John Mackintosh Howie
Publisher: Oxford University Press on Demand
ISBN: 9780198511946
Category : Business & Economics
Languages : en
Pages : 351
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Book Description
This book is an indispensable source for anyone with an interest in semigroup theory or whose research overlaps with this increasingly important and active field of mathematics. It clearly emphasizes "pure" semigroup theory, in particular the various classes of regular semigroups. More than 150 exercises, accompanied by relevant references to the literature, give pointers to areas of the subject not explicitly covered in the text.
Author: John Mackintosh Howie
Publisher:
ISBN:
Category : Mathematics
Languages : en
Pages : 292
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Book Description
Author: Mario Petrich
Publisher: Wiley-Interscience
ISBN: 9780471195719
Category : Mathematics
Languages : en
Pages : 0
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Book Description
Present a systematic treatment of completely regular semigroups, from introductory to research level, comprised of preliminaries on lattices, semigroups, varieties, and complete regularity; congruences and relations on the congruence lattice; and varieties of completely regular semigroups through kernals, and traces of congruences and Malcev products.
Author: Francis J. Pastijn
Publisher: Pitman Advanced Publishing Program
ISBN:
Category : Mathematics
Languages : en
Pages : 214
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Book Description
