Le Matematiche  

Sonia Brivio

Let X be a projective manifold, of dimension n=3, and L a very ample line bundle on X. In this paper we investigate the pairs (X,L) with the following property: there exists a transversal intersection of n-1 members of |L| which is a smooth d-gonal curve ... see more

Sebastiano Pennisi, Massimo Trovato

In a Minkowsky space V, complete representation formulae are derived for scalar-valued, vector valued and tensor-valued sunctions subjected to the principle of relativity with an arbitrary number of scalars, vectors and tensors (of the second order symmet... see more

Maria Corinna Marino

The purpose of this paper is to study the intersection between Steiner quadruole systems having in common two sets of blocks, one of these containing all and only all the blocks with a given pair of elements.

Snezhana Hristova, Drumi D. Bainov

In the paper a technique of approximate finding of extremal quasisolutions of an inirial value problem for systems of functional differential equations is justified.

Jean Saint Raymond

ee directly the article.

Joachim Naumann

In the present paper we prove the existence and differentiability of weak solutions to the stationary semiconductor equations where the mobility coefficients model the effect of saturation of drift velocity. The proof of existence relies on approximation ... see more

Frank Harary, Randall Maddox, William Staton

In a linear forest, every component is a path. The linear arboricity of a graph G is the smallest number of edge disjoint linear forests whose union is G; this concept has been much studied. We now introduce the point linear arboricity of G, defined as th... see more

Angelo Bella

In this note we characterize those measure spaces (O,A,µ) for which L1(µ)=L1loc(µ); Here O is a topological space not necessarily measurable.

G. Ladas, C. Qian

We obtain sufficient conditions for the oscillation of all solutions of linear difference equations with positive and negative coefficients of a particular form.

Angela Gallo, Anna Maria Piccirillo

We consider unilateral second order Cauchy problem. We prove an existence theorem.

R. K. Sakena, R. Kumar

In this note the authors derive three transformations for the basic hypergeometric functions of two variables by making use of certain known summations formula. As q ? 1, known transformations for ordinary hypergeometric functions giver earlier by Carlitz... see more

Frank Harary, Zsolt Tuza

We prove that the edge of Kn cannot be partitioned into less than (n-1)/t Pi+2-free subgraphs. We show that this inequality is sharp and characterize the edge partitions which attain it. In the process, we point out a surprising connection between the c... see more