Ricerche di Matematica

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A note on the supersolubility of a group with ms-supersoluble factors
Ricerche di Matematica - Tập 70 - Trang 517-521 - 2020
Alexander Trofimuk
A subgroup A of a group G is called seminormal in G, if there exists a subgroup B such that $$G=AB$$ and AX is a subgroup of G for every subgroup X of B. Let G be a supersoluble group. Then it has an ordered Sylow tower of supersoluble type  ...... hiện toàn bộ
On the influence of diffusion on the competition between bacteria and innate immune system of invertebrates
Ricerche di Matematica - Tập 59 Số 2 - Trang 165-185 - 2010
Marianna Cerasuolo
On sylowizers in finite p-soluble groups
Ricerche di Matematica - Tập 56 - Trang 189-194 - 2007
M. J. Iranzo, Julio P. Lafuente, F. Pérez-Monasor
In general, given a finite group G, a prime p and a p-subgroup R of G, the sylowizers of R in G are not conjugate. In this paper we afford some conditions to achieve the conjugation of the sylowizers of R in a p-soluble group G, among others ...... hiện toàn bộ
On semicomplete finite p-groups
Ricerche di Matematica - Tập 72 - Trang 417-422 - 2022
Rasoul Soleimani
Let G be a finite group and N be a non-trivial proper normal subgroup of G. The pair (G, N) is called a Camina pair if $$xN\subseteq x^G$$ for all $$x\in G\setminus N$$ , where ...... hiện toàn bộ
Finite planar spaces with projective points
Ricerche di Matematica - Tập 58 - Trang 263-270 - 2009
Vito Napolitano, Domenico Olanda
In this paper a class of finite planar spaces with projective points is characterized.
Exponential stability of a coupled wave system with thermal effects
Ricerche di Matematica - - Trang 1-17 - 2022
Li Zhang, Wenjun Liu, Yanning An, Xinxin Cao
This paper is concerned with the stability of a coupled wave system in one-dimensional space with thermal effects, which is coupled by velocities. We prove the well-posedness of the system by using Lumer-Phillips theorem, and then turn out the exponential stability of the system via the semigroup method. The main novelty of this paper is that the heat-affected system achieves exponential stability...... hiện toàn bộ
Almost symmetric good semigroups
Ricerche di Matematica - - Trang 1-15 - 2023
L. Casabella, M. D’Anna
The class of good semigroups is a class of subsemigroups of $${\mathbb {N}}^h$$ , that includes the value semigroups of rings associated to curve singularities and their blowups, and allows to study combinatorically the properties of these rings. In this paper we give a characterization of almost symmetric goo...... hiện toàn bộ
Weighted $$p(\cdot )$$-Laplacian problem with nonlinear singular terms
Ricerche di Matematica - Tập 72 Số 1 - Trang 45-62 - 2023
Jaouad Igbida, N. Elharrar, H. Talibi
Two classes of exact solutions in the linear elastodynamics of transversely isotropic solids
Ricerche di Matematica - - 2024
Kumbakonam R. Rajagopal, Giuseppe Saccomandi, Luigi Vergori
Due to the formal resemblance of some models for the Cauchy stress tensor of elastic solids and viscous fluids, some classes of exact solutions for the equations governing the flows in Navier–Stokes fluids have been generalized to linear and nonlinear elastodynamics. In this paper, we study the conditions under which two special classes of generalized Beltrami flows, the vortices in lattice form a...... hiện toàn bộ
Perfect locally finite groups that are product of normal soluble subgroups of bounded derived length
Ricerche di Matematica - - 2022
Ahmet Arıkan, Selami Ercan
In the present article we consider infinite locally finite perfect groups that are product of proper normal soluble subgroups of derived length at most n ( $$\Pi {\mathfrak {S}}_n$$ -groups for short) for some fixed positive integer n and give structural results for these groups. Also we provide some consequenc...... hiện toàn bộ
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