Anul XLIX 2004

S T U D I A

UNIVERSITATIS BABEŞ-BOLYAI

MATHEMATICA

1

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

SUMAR – CONTENTS – SOMMAIRE

M. Antal and A. Soos, Unsupervised Classification for Designing Speaker

Identification Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . 3

C. Bacoţiu, Data Dependence of the Fixed Points Set of Weakly Picard Operators

in Generalized Metric Spaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

T. Baranyai, Asymptotic Fixed Point Theorems in E-metric Spaces . . . . . . . . . . . . . . . 19

Z. Finta, Approximation by Generalized Brass Operators . . . . . . . . . . . . . . . . . .. . . . . 23

A. Horvat-Marc, The First Eigenvalue and Existence Results . . . . . . . . . . .. . . . . . . . . 41

C. Modoi, Modules over Triangulated Categories and Localization . . . . . . . . . . . . . . 49

H. Ovesea-Tudor, Univalence Criteria Connected with Arithmetic and

Geometric Means . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . .55

C. Pelea, On the Direct Limit of a Direct System of Complete Multialgebras . .. . . . . . 63

M. Purcaru and M. Târnoveanu, A Remarkable Structure and Connections

on the Tangent Bundle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

G. S. Sălăgean, H. M. Hossen and M. K. Aouf, On Certain Classes of

p-valent Functions with Negative Coefficients. II . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

I. Somogyi, The Study of Remainder for Some Cubature Formulas for

Triangular Domain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

D. D. Stancu, I. Tascu and A. Beian-Putura, On a Class of Generalized

Gauss-Christoffel Quadrature Formulae . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

R. Szasz, A New Convexity Criterion . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . 101

S. Sandor and J. Sondow, Corrigendum: On the Irrationality of Some

Alternating Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

Book Reviews . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107