Anul XLVIII                                                                               2003

 

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

 

 

Ştefan Cobzaş, Professor Wolfgang W. Breckner at his 60th Anniversary . . . . . . . . . . . 3

 

Daniel Breaz and Nicoleta Breaz, Starlikeness conditions for the Bernardi

operator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

 

Brigitte E. Breckner, A Note on the Divisibility of Some Compression

Semigroups in Sl(2,R) . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . 19

 

Wolfgang W. Breckner, A Maximum Principle for a Multiobjective

Optimal Control Problem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . 25

 

Ştefan Cobzaş, Adjoints of Lipschitz Mappings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

 

Adrian Diaconu, The Approximation of the Equation’s Solution in Linear

Normed Spaces Using Approximant Sequences (II) . . . . . . . . . . . . . . . . . . . . . . .. . . . . 55

 

Daniela Inoan, Continuity of the Solution of a Nonlinear PDE with Respect

to the Domain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

 

Marian Mureşan, Constraint Controllability in Infinite Dimensional Banach

Spaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . 85

 

I. Purdea and N. Both, Attributive Causality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

 

Ioan A. Rus, Some Applications of Weakly Picard Operators . . . . . . . . . . . . . . . . .. . 101

 

J. Sandor, On Certain Classes of Generalized Convex Functions with

Applications, II . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .109

 

Book Reviews . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119