11 articles in this issue
Lucia Doretti
Let X be a set of distinct points in “generic position” in P2k, k algebraically closed field of characteristic zero. We describe the base locus for the system of curves of minimal degree passing through X, provided that the homgeneous ideal I(X) has a min... see more
Uwe Nagel
A relation between Hilbert functions of linked ideals is established and discussed in various examples. Then it is applied to compute the degree of the intersection of two projective schemes in a special situation.
Janusz Charatonik
Results concerning contractibility of curves (equivalently: of dendroids) are collected and discussed in the paper. Interrelations tetween various conditions which are either sufficient or necessary for a curve to be contractible are studied.
Elvira Mirenghi, Addolorata Salvatore
See directly the article.
Immacolata Del Prete, Margherita Di Iorio
In this paper is studied a condition, called P-continuity, which can be viewed as minimal in order that a set valued mapping be connected. Moreover for families of functions are considered notions of convergence which preserve P-semicontinuity. Other resu... see more
Michele Frasca, Alexandre V. Ivanov
We prove the partial regularity of the weak solutions of the quasilinear nonuniformely elliptic system div(A(?u))=0 under an ellipticity condition which lies between strong ellipticity and Legendre-Hadamard condition.
Emma Frigerio, Cristina Turrini
Consider a line congruence in P4(C) or, equivalently, a smooth threefold V in the Grassmannian G(1,4); We say that the congruence has type (m,n) if V is numerically equivalent to mO(0,4)+nO(1,3). We prove that there are no general, non-degenerate line con... see more
Maria Morandi Cecchi, Rosaria Nociforo
Theory, error-bound and applications of Discrete Finite Element Method is given to solve a class of linear one and two-dimensional parabolic problems on Sobolev space-time domains, with non-homogeneous discontinuous initial data and general boundary condi... see more
R. K. Saxena, R. K. Gupta
Certain transformations involving the Lauricella functions of three variables are given by Saran [4,5] and Exton [2]. The object of this paper is to derive the basic analogue of some of these transformations.
Giovanni Fiorito, Rosario Musmeci, Mario Strano
In this paper we prove some theorems that emphasize properties of the series whose terms are defined recursively. Suitable examples and counter-examples complete the theory.
Angelo Bella
It is shown it is consistent with ZFC the existence of a dense in itself perfectly normal space such that every real valued continuous function defined in it is locally constant.