Anul XLVI 2001

S T U D I A

UNIVERSITATIS BABEŞ-BOLYAI

MATHEMATICA

4

Redacţia: 400084 Cluj-Napoca, Str. M. Kogălniceanu nr. 1 Tel: 405300

SUMAR – CONTENTS – SOMMAIRE

Avishek Adhikari and P.K. Rana, A Study of Functors Associated with

Topological Groups . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Florica Aldea, Some Homeomorphism Theorems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Cristina Antonescu, Interpolation Results for Some Classes of Absolutely

Summing Operators. . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Tunay Bilgin, Lacunary Strong A-Convergence with Respect to a Modulus. . . . . . . . . 39

Emil O. Burton, A Generalized Inversion Formula and Some Applications . . . . . . . . .47

Ioana Chiorean, Parallel Numerical Methods for Solving Nonlinear

Equations. . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Zoltan Finta, Pointwise Approximation by Generalized Szasz-Mirakjan

Operators. . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Doina Ionac, Some Duality Theorems for Linear-Fractional Programming

Having the Coefficients in a Subfield K of Real Numbers. . . . . . . . . . . . . . . . . . . . .. . . 69

Zheng Liu, On Gauss Functional Equations and Mean Values by H. Haruki

and Th.M. Rassias. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Cristinel Mortici, Semilinear Equations in Hilbert Spaces with

Quasi-Positive Nonlinearity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

Ioan A. Rus and Bogdan Rus, Dynamics on (Pcp(X),Hd) Generated by a Set

of Dynamics on (X, d) . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

Tiberiu Trif, On Certain Inequalities Involving the Identric Mean in n

Variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

Book Reviews. . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .115