Le Matematiche  

Harold Exton

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Giampiero Chiaselotti

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Šárka Matušû-Necasová

The global existence of a weak solution  of viscous compressible real tripolar heat conductive fluid of initial boundary problem is proved.

Elisabetta Barletta, Sorin Dragomir

We adopt the methods of pseudohermitian geometry (cf. [16]) to study the tangent sphere bundle U(M) over a Riemannian manifold M. If M is an elliptic space form of sectional curvature 1 then U(M) is shown to be globally pseudo-Einstein (in the sense of J.... see more

Lucina Rempulska, Mariola Skorupka

We give the Voronovskaya theorem for some operators  of the Szasz-Mirakjan type defined in the space of functions continuous on [0,+infinity) and having the polynomial grouth at infinity. Some approximation properties of these operators are given in ... see more

R. K. Saxena, Rajendra Kumar

In the present paper the authors define a new basic hypergeometric function which is an extension of the basic H-function defined earlier by Saxena et al [11]. Three basic integral representation for this function are investigated, which provide elegant g... see more

Rosa Stangarone

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Luisa Fattorusso, Giovanna Idone

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Dumitru Popa

We prove that measures with relatively norm compact range correspond to the infinite-nuclear operators and to a p-Bochner integrable function (resp. p-Pettis integrable function) correspond a p-nuclear operator (resp. a q-nuclear operator).

Barbara Zubik-Kowal

The paper deals with initial problem for  differential-functional equations. The sufficient conditions for the existence of some monotone function sequences are given.The error extimation of the approximate solutions is given. The Caratheodory soluti... see more

Mariola Skorupka

We introduce some linear positive operators of the Szasz-Mirakjan type in the weighted spaces of continuous functions in two variables. We study the degree of the approximation of functions by these operators. The similar results for functions in one vari... see more

Hasan M. Ymeri

Lowndes has defined the new operators of fractional integration which generalize the operators due to Erdelyi and Kober. The purpose of this paper is to develop a theory of these fractional integral operators given by Lowndes for a certain class of functi... see more

Danut Marcu

In this note we show that every connected graph G of order >> 3 has two distinct vertices u  and v such that G-u, G-v and G-u-v are connected.

Grazia Raciti

In this paper we relate primitive linear series on a smooth plane curve C with the following properties of zero-dimensional subschemes X of the projective plane:1) Cayley-Bacharach "at degree a"2) the absence of non assigned base pointson C for the linear... see more

Mario Marino, Antonino Maugeri

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Liliana Pavel

errata corrige.