Le Matematiche  

B. Hamour

In this paper we consider the problemwhere O is an open bounded set of RN (N = 3), A(x) is a coercive matrix with coefficients in L8(O), H(x,s,?) is a Carathe ´odory function which satisfies for a given ? > 0 and some c0 = 0The nonnegative term a0 belo... see more

S. Khojasteh

Let R be a commutative ring. The cozero-divisor graph of R denoted by G'(R) is a graph with the vertex set W*(R), where W*(R) is the set of all non-zero and non-unit elements of R, and two distinct vertices x and y are adjacent if and only if x ?/ Ry and ... see more

S. El Manouni, Y. Lazar

We study the distribution of the eigenvalues of a linear operator associated to a hyperbolic partial differential equation with periodic boundary conditions. Using some recent results concerning the distributions of the values of indefinite quadratic form... see more

W. Hara

Segal constructed a derived equivalence for an interesting 5-fold flop that was provided by Abuaf. The aim of this article is to add some results for the derived equivalence for Abuaf's flop. Concretely, we study the equivalence for Abuaf's flop... see more

Y. Habbachi, B. Bouras, S. Zdiri

In this paper, we consider the raising operator R? = ? Tµ + xI, ? ?= 0, where Tµ and I are the Dunkl operator and the identity operator respec- tively. Our purpose is to determine all monic orthogonal polynomials se- quences {Pn(x)}n=0 such that the seque... see more

B.P. Allahverdiev, H. Tuna

In this study, Hahn multiplicative calculus was introduced and as an application of this subject, the classical Sturm--Liouville problem was examined under this structure.

L. Kong, M. Wang

By using variontional methods, we establish criteria for the existence of at least three solutions to a second order discrete problem with two parameters. Applications of the maintheorem to several special cases of the problem are discussed and two exampl... see more

M.P. Ly, M.A. Diop, K. Ezzinbi

In this work, we focus on a specific category of nonlocal integrodifferential equations. The development of a few new sufficient postulates that guarantee solvability and approxi- mative controllability is described here. We apply the theory of the resolv... see more

J. Saint Raymond

The aim of this paper is to improve or simplify some theorems which have been published in the paper ``Fixed points for non-expansive set-valued mappings"  in this journal after a stay of the author at the University of Catania. In particular in the ... see more

D. Giandinoto

In this paper, we deal with new applications of two minimax theorems of B. Ricceri ([5],[9]). Here is a particular case of one of the results that we obtain: Let (T,F,µ) be a non-atomic measure space, with µ(T) < +8, (E , ? · ?) a real Banach space, I ... see more

A. Ahmed, M.S.B. Elemine Vall

In this paper we study the existence of infinitely many weak solutions of the following perturbed Kirchhoff-type non-homogeneous Neumann problemby applying technical approach based on critical points theorem due to B. Ricceri in a reflexive anisotropic So... see more

J. Saint Raymond

Let X be a topological space, I and J be sequentially l.s.c. real functions on X such that J is non-negative with sequentially compact sub-levels, and I/J is not bounded from below outside the sublevel J-1([0,c[) of J for some c>0. Is it true that for ... see more

D. Drihem

We introduce Herz-type Sobolev spaces on domains, which unify and generalize the classical Sobolev spaces. We will give a proof of the Sobolev-type embedding for these function spaces. All these results generalize the classical results on Sobolev spa... see more