Le Matematiche  

Sándor Szabó

Let G be a finite abelian group and let G = A_1 · · · A_n  be a factorization of G into its subsets A_1 , . . . , A_n. For a given G certain choices of the orders |A_1|, . . . , |A_n| guarantee that one of the factors is periodic. In connection with ... see more

Rajeev K. Gupta, Shireen Tabassum, Amit Mathur

In this paper, we define a q-extension of the new generalized hypergeometric function given by Saxena et al. in [13], and have investigated the properties of the above new function such as q-differentiation and q-integral representation. The results prese... see more

Soley Ersoy, Murat Tosun

In this paper, the sectional curvature of non-degenerate tangent sections of time-like ruled surface with the central ruled surface in n-dimensional Minkowski space, R_1^n  is studied. The relationship between normal sectional curvature and the princ... see more

Maria Scafati Tallini, Maurizio Iurlo

A corpid is a ring (K, +, ·), different from zero, such that (K, ·) is an inverse semigroup. We define an order relation and the notion of simple element. By this we prove several results and a characterization of corpids.

Islam Shehu

In this paper we prove that Theorem of Phragmén-Lindelöf’s can be applied in abstract elliptic equation of second order.

Sunil Dutt Purohit

The object of this paper is to illustrate how the q-fractional calculus approach can be employed to derive a number of summation formulae for the generalized basic hypergeometric functions of one and more variables in terms of the q-gamma functions.

Alexander M. Blokhin, S. A. Boyarskiy, B. V. Semisalov

We discuss the construction of a class of difference schemes for a hydrodynamical model of charge transport in semiconductors.

Shquipe I. Lohaj, Muhib R. Lohaj

In this paper two results are given . It is proved that if the essential spectrum s(p(T)) of the bounded hyponormal operator T is contained in a circle, then T is essentially normal operator. Based on this result it is proved that if T? L(H) with  in... see more

Giovanni Molica Bisci

The aim of this paper is to investigate some consequences of a nonsmooth version, established in [13], of Ghoussoub’s general min-max principle [8, Theorem 1]. An application to a class of elliptic variational-hemivariational inequalities is also pointed ... see more

Gioia Failla

For a vector space R ? k^{m+1}  of dimension r + 1 on the algebraically closed field  k we determine, for any i = r, the possible numbers of Hankel i-planes contained in the r-plane P(R), linear space in P^m .

Maria Scafati Tallini, Maurizio Iurlo

A corpid is a ring (K, +, ·), different from zero, such that (K, ·) is an inverse semigroup. We prove a characterization of corpids, some remarkable results about the lattice of the idempotents and other results concerning the idempotents and the zero div... see more

Rexhep Gjergji

In this paper it is proved that:A) Up to isomorphism and duality there are exactly two possible orbital structures for a putative symmetric block design with parameters (153, 57, 21) constructed using the Frobenius group F_{17·16}B) Up to isomorphism and ... see more

Rossella Corporente

We establish a connection between A_F and G_? classes of weights (see [13], [23]) in the context of Orlicz spaces. We give a generalization of a previous result (see [11])

Abdellah El Kinani, A. Roukbi, A. Benazzouz

Let G be a locally compact group and ? be a weight on G. For p ? ]1, +8 [, we give a necessary and sufficient condition, on ?, for L_?^p (G) to be a Banach algebra. The case where ? is biinvariant under a subgroup K of G is also considered.