Results 81 to 90 of about 760 (210)

Semigroup presentations

, 2012
In this thesis we consider in detail the following two fundamental problems for semigroup presentations: 1. Given a semigroup find a presentation defining it. 2. Given a presentation describe the semigroup defined by it.
Ruškuc, Nik
core  

Regularity and Green's Relations on a Semigroup of Transformations with Restricted Range

International Journal of Mathematics and Mathematical Sciences, 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.
Jintana Sanwong, Worachead Sommanee
doaj   +1 more source

Noncommutative polygonal cluster algebras

Journal of the London Mathematical Society, Volume 113, Issue 4, April 2026.
Abstract We define a new family of noncommutative generalizations of cluster algebras called polygonal cluster algebras. These algebras generalize the noncommutative surfaces of Berenstein–Retakh, and are inspired by the emerging theory of Θ$\Theta$‐positivity for the groups Spin(p,q)$\mathrm{Spin}(p,q)$.
Zachary Greenberg, Dani Kaufman, Merik Niemeyer, Anna Wienhard   +3 more
wiley   +1 more source

The Algebraic View of Computation: Implementation, Interpretation and Time

Philosophies, 2018
Computational implementations are special relations between what is computed and what computes it. Though the word “isomorphism” appears in philosophical discussions about the nature of implementations, it is used only metaphorically. Here we
Attila Egri-Nagy
doaj   +1 more source

Particular case of operator calculus for generalized functions with supports in cone

Karpatsʹkì Matematičnì Publìkacìï, 2009
In this work the construction of functional calculus for strongly continuous semigroups of operators in Schwartz distribution algebra on some cone is generalized.
A. V. Solomko
doaj  

Commutative nilpotent transformation semigroups [PDF]

Funding Information: This work is funded by national funds through the FCT\u2014Funda\u00E7\u00E3o para a Ci\u00EAncia e a Tecnologia, I.P., under the scope of the projects UIDB/00297/2020 and UIDP/00297/2020 (Center for Mathematics and Applications ...
Malheiro, António, Cain, Alan J., Paulista, Tânia   +2 more
core   +1 more source

Natural Partial Order on Generalized Semigroups of Transformation Semigroups That Preserve Order and an Equivalence Relation

Journal of Mathematics
Let X be a finite total order set and E be a convex equivalence relation on X. We denote that OEX=f∈TEX:∀x,y∈X,x≤y⟹fx≤fy , where TEX is an E− preserving transformation semigroup.
Meiqing Qin, Xuerong Fu
doaj   +1 more source

Transformation semigroups

, 1993
SIGLEAvailable from British Library Document Supply Centre- DSC:q95/31583 / BLDSC - British Library Document Supply CentreGBUnited ...
Higgins, P.M, Essex Univ., Colchester (United Kingdom). Mathematics Dept   +1 more
core  

Co-annihilating graphs of partial transformation semigroups: structure and basic invariants

Arab Journal of Basic and Applied Sciences
Let [Formula: see text] and [Formula: see text] Denote by [Formula: see text] the partial transformation semigroup on [Formula: see text] Clearly, the empty set [Formula: see text] is a zero element of [Formula: see text] which is written as 0.
Chollawat Pookpienlert, Nuttawoot Nupo, Yanisa Chaiya   +2 more
doaj   +1 more source

Derivations and KMS-Symmetric Quantum Markov Semigroups. [PDF]

Commun Math Phys, 2023
Vernooij M, Wirth M.
europepmc   +1 more source