13 articles in this issue
Pietro Cerone
Series arising from Volterra integral equations of the second kind are summed. The series involve inverse powers of roots of the characteristic equation. It is shown how previous similar series obtained from differential-difference equations are particula... see more
Giorgio Pederzoli
Si considera il rapportotra due forme quadratiche di variabili normali indipendenti e la sua distribuzione sulla ipersfera unitaria. Viene poi ottenuta una decomposizione per forme quadratiche in termini di vettori aleatori di tipo sferico. Si ottengono i... see more
Xue-Gang Yuan, Ping Wei
In this work we study the well-known problem put forward by S. N. Bernstein in 1930. We construct an operator that converges and give a bound for the best convergence order.
N. H. Abdel All, H. N. Abd-Ellah
The mean curvature vector plays an important role in the investigation of crystallographie point of view of the minimal surfaces.
Dumitru Popa
See directly in the article.
Irene Sisto
Measurability with respect to a d-ring of unitary elements of a Dedekind s-complete Riez space with a weak order unit and integrability with respect to a positive and finite measure are investigated here.
Ebrahim Youness, Abd El-Moneim Megahed
In this paper we study a fuzzy differential game problem, in which the information obtained by any player may contain some sort of uncertainties, which are usually difficult to characterize either deterministically or stochastically. A necessary condition... see more
Silvana Marchi
We study the Hölder continuity of the homogeneous gradient of the weak solutions of double obstacle problems involving nonlinear elliptic operators in the Heisenberg group.
Silvia Abrescia, Laura Bazzotti, Lucia Marino
Jaroslav Hancl
The concept of trascendental sequence is defined in this contribution by means of the related trascendental series. The main results are two criteria for when certain sequences are trascendental. Several applications are presented.
Hironobu Ishihara
Let E be a vector bundle of rank r on a projective variety X of dimension n with only log-terminal singularities. We classify the couples (E,X) satisfying some conditions. We give some applications in case of sectional genus one.
Sandro Rajola, Maria Scafati Tallini
We call planar space a triple (S,L,P), where (S,L) is a finite linear space non reduced to a line and P is a family of proper subspaces of (S,L), called planes, such that every plane contains three non-collinear points and through three non-collinear poin... see more
Andrea Caruso
A characterization of inclusion between L^p-spaces is well-known. Here we present an analogous characterization for Orlicz spaces. To this aim we use some definitions of Orlicz and Luxemburg norm that are a little bit general then usual. Also this allows ... see more