15 articles in this issue
M. El-Ghoul, M. R. Zeen El-Deen
This paper is a continuation of [5]. It introduces the local properties of the fuzzy manifold. the fuzzy vector field in a fuzzy tangent space will be defined. Theorems governing the relation between the folding of the fuzzy tangent space and the folding ... see more
Harold Exton
Certain aspects and a contribution to the theory of new forms of solutions of an algebraic form of the generalized ellipsoidal wave equation are deduced by considering the Laplace transform of a soluble system of linear differential equations. An ensuing ... see more
El-Said R. Lashin, Tarek F. Mersal
The aim of this paper is to detect a homotopy to a spherical curve with invariant total normal twist 0. Also, we use conformal transformation to prove a theorem that for any immersed closed C^3 -curve c in the Euclidean 3-space E^3 with vanishing total no... see more
Mihail Megan, Vincentiu Cuc
Inthis paper we study some stability concepts for linear systems the evolution which can be described by a C_0 -quasisemigroup.The results obtained may be regarded as generalizations of well known results of Datko, Pazy, Littman and Neerven about exponent... see more
Maria Lucia Fania
We study polarized manifolds (X, L) with L having a smooth element A in its linear system which is a Fano manifold of coindex 3 and second Betti number greater or equal than 2.
A. A. El-Bary, I. H. El-Sirafy
Cauchy integral method has been applied to derive exact and closed expressions for Goursat's functions for the first and second fundamental problems for the infinite plate weakened by a hole having arbitrary shape.The plate considered are conformally mapp... see more
Edoardo Ballico
Here we study the Weierstrass points of singular bielliptic curves in characteristic 0. Most of our results are existence results of the type "there exists a bielliptic curve Y with certain singular points and with a weierstrass point P ? Y_{reg} with a p... see more
Gonoko Moussa
In this paper, we give some isoperimetric inequalities for the capacity c p of an anisotropic configuration.
Silvia Noschese, Paolo Emilio Ricci
By using the inverse iteration method we improve approximation of the eigenvalues of a kernel connected with a problem considered by A.M. Ostrowski.
Roberto Conti
Le Matematiche Vol. 53, Fasc. II (1998), 207-240
Nunzia A. D'Auria, Ornella Fiodo
In this paper we obtain a representation for the solution of a parabolic mixed problem.
Sandro Rajola, Maria Scafati Tallini
We suitably define the triangular projective planes of order q and connect them with the (q + 1)-arcs. In particular, a finite projective plane is either triangular, or contains a lot of (q + 1)-arcs.
Here we classify all complex singular irreducibile projective curves. X , such that there exists a holomorphic map f : X ? X with f locally biholomorphic at each point of X_{reg} and with deg( f ) = 2 : X is rational and either it has a unique singular po... see more
Rosalba Di Vincenzo
See directly the article.
Domenico Freni
In the papers [9], [10] we introduced and studied M_? -hypergroupoids; also, we obtained some results on the automorphism group of a G_ ? -hypergroupoid. In particular, given a group G and one of its element ?, we proved that the automorphisms of the ... see more