17 articles in this issue
Hasan N. Ymeri
In this paper we first study the stability of Ritz-Volterra projection and its maximum norm estimates, and then we use these results to derive some L\inftyerror estimates for finite element methods for parabolic partial integro-differential equations.
Giorgio Bolondi
We construct curves for which the generalized lifting property does not hold, with high degree. We discuss the behaviour of the Hilbert function of the general plane section of these curves.
Ottavio Caligaris, Pietro Oliva
Duality between the space of continuous functions and the space of bounded variations functions can be easily characterized by means of Riemann-Stieltjes integrals when we consider real valued functions defined, e.g., on [0,1]; here we give a self-contain... see more
R. K. Saxena, R. Kumar
This paper deals with the derivation of certain new transformations for the basic hypergeometric functions of two variables by making use of known summation formulas given earlier by Srivastava [7]. As q ? 1, known transformations for ordinary hypergeomet... see more
Alexander Blokhin, Evgeniy Mishchenko
This paper is devoted to investigation of the linearized mixed problem of shock waves stability in relativistic gas dynamics. The problem of symmetrization of relativistic gas dynamics equations is also discussed.
Bruna Germano, Paolo Emilio Ricci
The moments of the density of zeros of orthogonal polynomial systems generated by athree-term recurrence relation are represented by Lucas polynomials of the first kind and by Bell polynomials.
Lucio R. Berrone
In this paper we deal with the problem of enumerating the finite topological spaces, studying the enumeration of a restrictive class of them. By employing simple techniques, we obtain a recursive lower bound for the number of topological spaces on a set o... see more
Andrea Del Centina, Alessandro Gimigliano
We study smooth projective varieties X ? PNof dimension n = 3, such that for some linear (N-n+1)-dimensional space ? ? PN, C=Xn? is either a bielliptic or a trigonal curve. We give a description of X when deg = 18 and when deg X = 8.
Claudio Barone, Santo Motta
If the collisions are redefined as a flux a kinetic conservation law can be written in divergence form. This can be handled numerically, in the framework of Finite Particle Approximation, using the CRF-method. In this paper we use the CRF-method for semic... see more
Giovanni Fiorito, Rosario Musmeci, Mario Strano
In this paper we investigate the uniform distribution in [0,T] (T ? R+- Q) of a suitable sequence. Then we give an interesting application to the study of a class of series whose terms are defined recursively.
Rosario Strano
Let C ? P rk, k algebraically closed field of characteristic 0, be a curve and let e(C)={max n | H1(OC(n))?0} its speciality. Let G be the generic hyperplane section and e ={max n | H 1(IG(n))?0}. We prove that, if G is generated in degree = e , then e(C)... see more
Fulvio Zuanni
In this paper we give some constructions of irreducible blocking sets contained in a blocking set k-arc derived.
S. D. Bajpai
We present three semi-orthogonal properties of a class of Gauss' hypergeometric polynomials.
T. S. S. R. K. Rao
We exhibit classes of Banach spaces X which are M-embedded i.e., when X is canonically embedded in X**. X is an M-ideal in X**, for which the injective tensor product is again an M-embedded space.
Orazio Arena, Paolo Manselli
In an open cylinder of R3a linear uniformly elliptic operator in non-divergence form, with coefficients time independent but measurable only, is investigated. Existence and uniqueness results in suitable Sobolev spaces for the Dirichlet problem are obtain... see more
Salvatore Leonardi
We prove a Lax-Milgram type theorem using the concept of nearness between operators.
Sergio Campanato
We generalize the concept of contraction mappings by introducing that of small perturbations and we show for small perturbations of a bijective map, a fixed point theorem of Banach-Caccioppoli.As a consequence we give a proof of the theorem of Schnauder.