Results 51 to 60 of about 366 (139)
Hypercomplex operator calculus for the fractional Helmholtz equation
Mathematical Methods in the Applied Sciences, Volume 47, Issue 14, Page 11439-11472, 30 September 2024.In this paper, we develop a hypercomplex operator calculus to treat fully analytically boundary value problems for the homogeneous and inhomogeneous fractional Helmholtz equation where fractional derivatives in the sense of Caputo and Riemann–Liouville are applied.
Nelson Vieira +3 more
wiley +1 more source
On Minimal Fuzzy Ideals of Semigroups
Journal of Mathematics, Volume 2013, Issue 1, 2013., 2013 The present paper contains the sufficient condition of a fuzzy semigroup to be a fuzzy group using fuzzy points. The existence of a fuzzy kernel in semigroup is explored. It has been shown that every fuzzy ideal of a semigroup contains every minimal fuzzy left and every minimal fuzzy right ideal of semigroup.
Madad Khan +3 more
wiley +1 more source
A Porism Concerning Cyclic Quadrilaterals
Geometry, Volume 2013, Issue 1, 2013., 2013 We present a geometric theorem on a porism about cyclic quadrilaterals, namely, the existence of an infinite number of cyclic quadrilaterals through four fixed collinear points once one exists. Also, a technique of proving such properties with the use of pseudounitary traceless matrices is presented.
Jerzy Kocik, Michel Planat
wiley +1 more source
The Reduced Clifford Category of the Kachel Semigroup on n Letters
, 2013 We use a new description of Kachel semigroup as triples with a pushout product. A simple Clifford category as a canonical representative (under the relation of equivalence of categories) of the standard Clifford category of this semigroup is ...
Schwab, Emil D.
core +1 more source
Regularity and Green′s Relations on a Semigroup of Transformations with Restricted Range
International Journal of Mathematics and Mathematical Sciences, Volume 2008, Issue 1, 2008., 2008 Let T(X) be the full transformation semigroup on the set X and let T(X, Y) = {α ∈ T(X) : Xα⊆Y}. Then T(X, Y) is a sub‐semigroup of T(X) determined by a nonempty subset Y of X. In this paper, we give a necessary and sufficient condition for T(X, Y) to be regular.
Jintana Sanwong +2 more
wiley +1 more source
Identities in the Algebra of Partial Maps
, 2005 We consider the identities of a variety of semigroup-related algebras modelling the algebra of partial maps. We show that the identities are intimately related to a weak semigroup deductive system and we show that the equational theory is decidable.
Marcel Jackson +3 more
core +1 more source
Green index and finiteness conditions for semigroups
, 2008 Let S be a semigroup and let T be a subsemigroup of S. Then T acts on S by left and by right multiplication. If the complement S \ T has finitely many strong orbits by both these actions we say that T has finite Green index in S.
R. Gray +7 more
core +1 more source
, 2004 It is well known that a semigroup S is a Clifford semigroup if and only if S is a strong semilattice of groups. We have recently extended this important result from semigroups to semirings by showing that a semiring S is a Clifford semiring if and only ...
Sen, Mridul +2 more
core +1 more source
Compact semitopological inverse Clifford Semigroups
Semigroup Forum, 1972 An inverse Clifford Semigroup is a semilattice of groups. Conditions are given for constructing a compact semitopological (separately continuous multiplication) inverse Clifford semigroup on a compact Hausdorff semilattice. The conditions are necessary and sufficient for decomposing a compact inverse Clifford semigroup containing a dense subgroup and ...
openaire +2 more sources
A note on embedding of semigroup amalgams
, 2014 We give necessary conditions for the embedding of completely regular semigroup, Clifford semigroup and commutative regular semigroup ...
Rahkema, Kristiina, Sohail, Nasir
core +1 more source