Ricerche di Matematica
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$$nD-pD$$ n D - p D Dimensional reduction of micromagnetic structures
Ricerche di Matematica - Tập 64 Số 1 - Trang 9-24 - 2015
On singular nonhomogeneous elliptic equations involving critical Caffarelli–Kohn–Nirenberg exponent
Ricerche di Matematica - Tập 58 - Trang 207-218 - 2009
In this paper, we establish the existence of multiple solutions for nonhogeneous singular elliptic equations involving critical Caffarelli–Kohn–Nirenberg exponent, by using Ekeland’s Variational Principle and Mountain Pass Theorem without Palais Smale conditions.
On an anisotropic problem with singular nonlinearity having variable exponent
Ricerche di Matematica - Tập 66 - Trang 415-424 - 2016
We consider the following anisotropic problem, with singular nonlinearity having a variable exponent
$$\begin{aligned} \left\{ \begin{array}{ll} -\sum \limits _{i=1}^{N}\partial _{i}\left[ \left| \partial _{i}u\right| ^{p_{i}-2}\partial _{i}u\right] =\frac{f}{u^{\gamma (x) }} &{} \quad in~\Omega , \\ u=0 &{} \quad on~\Om...... hiện toàn bộ
The complete Steenrod algebra at odd primes
Ricerche di Matematica - Tập 57 - Trang 65-79 - 2008
We study the complete Steenrod algebra
$${{\hat{{\fancyscript A}}}}$$
for an odd prime p and its relations with the generalized Dickson algebra on infinitely many generators, as a
$${\mathbb{Z} [\frac{1}{p}]}$$
...... hiện toàn bộ
Prüfer property in amalgamated algebras along an ideal
Ricerche di Matematica - Tập 69 - Trang 111-120 - 2019
Let $$f : A \rightarrow B$$ be a ring homomorphism and J be an ideal of B. In this paper, we give a characterization of zero divisors of the amalgamation which is a generalization of Maimani’s and Yassemi’s work (see Maimani and Yassemi in J Pure Appl Algebra 212(1):168–174, 2008). Furthermore, we investigate the transfer of Prüfer domain concept to commutative rings with zero divisors in the amal...... hiện toàn bộ
$$L^2$$ L 2 -energy decay of convective nonlinear PDEs reaction–diffusion systems via auxiliary ODEs systems
Ricerche di Matematica - Tập 64 Số 2 - Trang 251-287 - 2015
Heat and mass transfer driven by stratified viscosity and thermal diffusion
Ricerche di Matematica - Tập 68 - Trang 253-264 - 2018
The transfer of heat and mass by convection in fluid layers is a challenging task as it can be driven by different factors. In the present paper the coupled action of viscosity and thermal diffusivity, both stratified, is investigated. The thermal conduction steady state is found and it is shown that: (1) steady convection occurs; (2) linear stability guarantees nonlinear asymptotic exponential en...... hiện toàn bộ
Complementarity between term-time forcing and delayed vaccination response in explaining irregular dynamics in childhood diseases
Ricerche di Matematica - Tập 67 - Trang 175-204 - 2018
This paper investigates an SIR model with the following properties: (i) demographics are present. (ii) The fraction vaccinating at any time is dependent on past levels of disease prevalence with distributed delay. (iii) The maximum fraction vaccinating is bounded below one by medical contraindications or unshakeable beliefs among a sub-set of the population that the vaccination is not beneficial. ...... hiện toàn bộ
Sarmanov bivariate distribution: dependence structure—Fisher information in order statistics and their concomitantsAbstract The Sarmanov family of bivariate distributions is considered as the most flexible and efficient extended families of the traditional Farlie–Gumbel–Morgenstern family. The goal of this work is twofold. The first part focuses on revealing some novel aspects of the Sarmanov family’s dependency structure. In the second part, we study the Fisher information (FI)... ... hiện toàn bộ
Ricerche di Matematica -
Recent results on nonlinear extended thermodynamics of real gases with six fields Part I: general theory
Ricerche di Matematica - Tập 65 - Trang 263-277 - 2016
We review the recently developed theory of extended thermodynamics (ET) of real gases with six independent fields, i.e., the mass density, the velocity, the temperature and the dynamic pressure, without adopting near-equilibrium approximation. We discuss the polytropic and non-polytropic cases of rarefied polyatomic gases in detail, including the closure via nonlinear molecular ET.
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