Results 71 to 80 of about 1,661 (220)

Semigroups: 2.8.0

, 2016
<p>The <strong>Semigroups</strong> package is a <strong>GAP</strong> package containing methods for semigroups, monoids, and inverse semigroups, principally of transformations, partial permutations, bipartitions ...
Pfeiffer, Markus, Egri-Nagy, Attila (8266182), Torpey, Michael, Jonusas, Julius (8266188), Ham, Nicholas (8266185), Ham, Nicholas, Smith, Jhevon (8266197), Pfeiffer, Markus (8266191), Smith, Jhevon, Wilson, Wilf, Egri-Nagy, Attila, Steinberg, Ben, Jonusas, Julius, East, James (8266179), Steinberg, Ben (8266194), Wilson, Wilf (8266203), Mitchell, James D. (8266173), Delgado, Manuel (8266176), Delgado, Manuel, Mitchell, James D., East, James, Torpey, Michael (8266200)   +21 more
core   +1 more source

On the theories classified by an étendue

Bulletin of the London Mathematical Society, Volume 58, Issue 7, July 2026.
Abstract We give a model‐theoretic characterisation of the geometric theories classified by étendues—the ‘locally localic’ topoi. They are the theories where each model is determined, syntactically and semantically, by any witness of a fixed collection of formulae.
Joshua L. Wrigley
wiley   +1 more source

Maximal subgroups of free idempotent-generated semigroups over the full transformation monoid

, 2011
Let Tn be the full transformation semigroup of all mappings from the set {1, . . . , n} to itself under composition. Let E = E(Tn) denote the set of idempotents of Tn and let e ∈ E be an arbitrary idempotent satisfying |im (e)| = r ≤ n − 2. We prove that
Ruskuc, N., Ruskuc, Nik, Gray, R, Gray, R.   +3 more
core   +1 more source

Exploring the Structure of Possibility Multi-Fuzzy Soft Ordered Semigroups Through Interior Ideals

Mathematics
This paper aims to introduce a novel idea of possibility multi-fuzzy soft ordered semigroups for ideals and interior ideals. Various results, formulated as theorems based on these concepts, are presented and further validated with suitable examples. This
Sana Habib, Kashif Habib, Violeta Leoreanu-Fotea, Faiz Muhammad Khan   +3 more
doaj   +1 more source

Semiprimeness of semigroup algebras

Open Mathematics, 2021
Abundant semigroups originate from p.p. rings and are generalizations of regular semigroups. The main aim of this paper is to study the primeness and the primitivity of abundant semigroup algebras.
Guo Junying, Guo Xiaojiang
doaj   +1 more source

Extremal rate of convergence in continuous dynamics

Journal of the London Mathematical Society, Volume 114, Issue 1, July 2026.
Abstract This paper deals with semigroups of holomorphic self‐maps of the upper half‐plane that exhibit an extremal (i.e., the slowest possible) rate of convergence to their Denjoy–Wolff point. The main novelty lies in the parabolic case of zero hyperbolic step.
Francisco J. Cruz‐Zamorano, Konstantinos Zarvalis   +1 more
wiley   +1 more source

Advanced control of non‐isothermal axial dispersion tubular reactors with recycle‐induced state delay

The Canadian Journal of Chemical Engineering, Volume 104, Issue 6, Page 3018-3037, June 2026.
Abstract We develop a delay‐aware estimation and control framework for a non‐isothermal axial dispersion tubular reactor modelled as a coupled parabolic‐hyperbolic PDE system with recycle‐induced state delay. The infinite‐dimensional dynamics are preserved without spatial discretization by representing the delay as a transport PDE and adopting a late ...
Behrad Moadeli, Stevan Dubljevic
wiley   +1 more source

Long‐Time Solvability and Asymptotics for the 3D Rotating MHD Equations

Mathematische Nachrichten, Volume 299, Issue 6, Page 1480-1509, June 2026.
ABSTRACT We consider the initial value problem for the 3D incompressible rotating MHD equations around a constant magnetic field. We prove the long‐time existence and uniqueness of solutions for small viscosity coefficient and high rotating speed. Moreover, we investigate the asymptotic behavior of solutions in the limit of vanishing viscosity and fast
Hiroki Ohyama
wiley   +1 more source

The transitivity of primary conjugacy in regular ω-semigroups

Open Mathematics, 2022
The conjugacy relation plays an important role in group theory and the conjugacy relation of groups has been generalized to semigroups in various methods by several authors.
Liu Xin, Wang Shoufeng
doaj   +1 more source

From Stability to Chaos: A Complete Classification of the Damped Klein‐Gordon Dynamics

Mathematical Methods in the Applied Sciences, Volume 49, Issue 9, Page 9696-9708, June 2026.
ABSTRACT We investigate the transition between stability and chaos in the damped Klein‐Gordon equation, a fundamental model for wave propagation and energy dissipation. Using semigroup methods and spectral criteria, we derive explicit thresholds that determine when the system exhibits asymptotic stability and when it displays strong chaotic dynamics ...
Carlos Lizama, Marina Murillo‐Arcila, Julio Puerta‐Fernández   +2 more
wiley   +1 more source