Results 101 to 110 of about 4,735 (227)

A graph theoretic approach to combinatorial problems in semigroup theory [PDF]

open access: yes, 2021
The use of graph theory has become widespread in the algebraic theory of semi¬ groups. In this context, the graph is mainly used as a visual aid to make presentation clearer and the problems more manageable.
Gray, Robert (Robert Duncan)
core  

On the Approximate Controllability of Fractional Evolution Equations with Generalized Riemann-Liouville Fractional Derivative

open access: yesJournal of Function Spaces, 2015
We discuss the approximate controllability of fractional evolution equations involving generalized Riemann-Liouville fractional derivative. The results are obtained with the help of the theory of fractional calculus, semigroup theory, and the Schauder ...
N. I. Mahmudov, M. A. McKibben
doaj   +1 more source

A semigroup approach to the Gnedenko system with single vacation of a repairman [PDF]

open access: yes, 2012
We investigate the Gnedenko system with one repairman who can take vacations. Our main focus is on the time asymptotic behaviour of the system. Using C 0-semigroup theory for linear operators we first prove the well-posedness of the system and the ...
Haji, Abdukerim, Radl, Agnes
core   +1 more source

Structure of the (Total) Transformation Monoids Under Rank N Generators [version 1; peer review: 2 approved]

open access: yesF1000Research
Throughout this paper our study focuses on transformation semigroups. These kinds of semigroups are the corner stone of semigroup theory. This is because every semigroup is isomorphic to transformation semigroup.
Asawer Al-Aadhami, Hala M. Sulaiman
doaj   +1 more source

Lie theory for semigroups

open access: yesSemigroup Forum, 1984
In den letzten Jahren haben sich namentlich die beiden Autoren wie auch J. Lawson mit möglichen Verallgemeinerungen der Lieschen Fundamentalsätze auf (lokale) Halbgruppen in Lieschen Gruppen befaßt. Dabei beginnen die Schwierigkeiten bereits bei der Eingrenzung geeigneter Klassen von Halbgruppen und der Definition passender infinitesimaler Objekte. Für
Hofmann, K.H., Hilgert, J.
openaire   +2 more sources

Recent developments in inverse semigroup theory

open access: yes, 2020
After reviewing aspects of the development of inverse semigroup theory, we describe an approach to studying them which views them as ‘non-commutative meet semilattices’.
Mark V. Lawson, Lawson, Mark V.
core   +1 more source

Semigroup analysis of structured parasite populations [PDF]

open access: yes, 2010
Motivated by the modelling of structured parasite populations in aquaculture we consider a class of physiologically structured population models, where individuals may be recruited into the population at different sizes in general. That is, we consider a
Green, Darren   +5 more
core   +1 more source

Some remarks on the domination between conjunctions and disjunctions

open access: yesAnnales Universitatis Paedagogicae Cracoviensis: Studia Mathematica, 2007
There are diverse domination properties considered in linear programming, game theory, semigroup theory and graph theory. In this paper we present a class of conjunctions which dominate each triangular conorm.
Paweł Drygaś, Anna Król
doaj  

Semigroups of order-decreasing transformations

open access: yes, 2012
Let X be a totally ordered set and consider the semigroups of orderdecreasing (increasing) full (partial, partial one-to-one) transformations of X. In this Thesis the study of order-increasing full (partial, partial one-to-one) transformations has been
Umar, Abdullahi
core  

Partial maps with domain and range: extending Schein's representation

open access: yes, 2009
The semigroup of all partial maps on a set under the operation of composition admits a number of operations relating to the domain and range of a partial map. Of particular interest are the operations R and L returning the identity on the domain of a map
Stokes, Tim E., Jackson, Marcel
core   +1 more source

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