Results 61 to 70 of about 1,356 (186)

Structure and Combinatorics on Right Groups

Mathematics
Right groups form an important bridge between group theory and semigroup theory, combining the algebraic symmetry of groups with the one-sided structure of right zero semigroups.
Aftab Hussain Shah, Dilawar Juneed Mir, Bana Al Subaiei   +2 more
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On 𝓠-regular semigroups

Open Mathematics, 2018
In this paper, we give some characterizations of 𝓠-regular semigroups and show that the class of 𝓠-regular semigroups is closed under the direct product and homomorphic images.
Feng Xinyang
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Skew Pairs of Idempotents in Partial Transformation Semigroups

Mathematics, 2021
Let S be a regular semigroup. A pair (e,f) of idempotents of S is said to be a skew pair of idempotents if fe is idempotent, but ef is not. T. S. Blyth and M. H. Almeida (T. S. Blyth and M. H.
Panuwat Luangchaisri, Thawhat Changphas
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Holomorphicc-semigroups and holomorphic semigroups

Semigroup Forum, 1989
This paper is concerned with holomorphic C-semigroups. The main purpose is to give a characterization of the C-complete infinitesimal generator of a holomorphic C-semigroup, which coincides with that of a holomorphic \((C_ 0)\)-semigroup in the case of \(C=I\). We also clarify the relationship between holomorphic C-semigroups and holomorphic semigroups
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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

Generalized perfect numerical semigroups [PDF]

Notes on Number Theory and Discrete Mathematics
In this work, we study the isolated gaps for generalized numerical semigroups, intro- duce generalized perfect numerical semigroups, and exemplify these semigroups.
Mohammad Zmmo, Nesrin Tutaş
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Automatic semigroups vs automaton semigroups

CoRR, 2016
We develop an effective and natural approach to interpret any semigroup admitting a special language of greedy normal forms as an automaton semigroup,namely the semigroup generated by a Mealy automaton encoding the behaviour of such a language of greedy normal forms under one-sided multiplication.The framework embraces many of the well-known classes of
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On absorption in semigroups and $n$-ary semigroups [PDF]

Logical Methods in Computer Science, 2015
The notion of absorption was developed a few years ago by Barto and Kozik and immediately found many applications, particularly in topics related to the constraint satisfaction problem. We investigate the behavior of absorption in semigroups and n-ary semigroups (that is, algebras with one n-ary associative operation).
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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

On bi-Γ-ideals in Γ-semigroups [PDF]

Songklanakarin Journal of Science and Technology (SJST), 2007
In 1952, R. A. Good and D. R. Hughes introduced the notion of bi-ideals of semigroups and in 1981, the concept of Γ-semigroups was introduced by M. K. Sen. We have known that Γ-semigroups are a generalizationof semigroups. In this research, the notion of
Ronnason Chinram, Chutiporn Jirojkul
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