Anul XLVII                                                                           2002

 

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

 

 

Gheorghe Coman, Ioan A. Rus and Leon Ţāmbulea, Professor Dimitrie D. Stancu,

at his 75th Birthday Anniversary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

 

Dan Bărbosu, Approximation Properties of a Bivariate Stancu Type Operator. . . . . . . . 13

 

Antal Bege,  Fixed Points of R-Contractions . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . 19

 

Gheorghe Coman, Ioana Pop and Radu T. Trīmbiţaş, An Adaptive Cubature

on Triangle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

 

Ogun Dogru, On Bleimann, Butzer and Hahn Type Generalization of

Balazs Operators . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . .. 37

 

Zoltan Finta, On Approximation Properties of Stancu’s Operators . . . . . . . . . . . . . .  . 47

 

Ioan Gānscă, Delia Drăgan and Radu T. Trīmbiţaş, On Generation of

Families of Surfaces . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . .57

 

J. Kolumban and A. Soos, Fixed Point Theorem in ΛE-Spaces .  . . . . . . . . . . . . .. . . . .65

 

Ion Mihoc and Cristina Ioana Fătu, Relation Between the Amount of

Information and the Likelihood Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75

 

Maria Mihoc, On the Classification of the Nomographic Functions of Four

Variables (II) . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

 

Petru T. Mocanu, Application of Close to Convexity Criterion to Filtration

Theory . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

 

Ioan A. Rus, Iterates of Stancu Operators, Via Contraction Principle . . . . . . . . . . . . 101

 

Dimitrie D. Stancu, Lucia A. Căbulea and Daniela Pop, Approximation

of Bivariate Functions by Means of the Operators . . . . . . . . . . . . . . . . . . . . 105

 

Fabian Todor, On the Orthogonal Polynomials of Pareto and Applications

on Mathematical Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

 

Maria Gabriela Trīmbiţaş, Combined Shepard-Least Square Operators –

Computing them Using Spatial Data Structures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .119