Anul XLVII 2002

 

S T U D I A

UNIVERSITATIS BABEŞ-BOLYAI

 

 

MATHEMATICA

2

 

 

 

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

 

 

SUMAR CONTENTS SOMMAIRE

 

Iluşca Bonta, Simple subalgebras of group graded algebras . . . . . . . . . . . . . . . . . . . . . .3

 

Daniel Breaz and Nicoleta Breaz, Univalence conditions for certain

integral operators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

 

Simion Breaz and Ciprian Modoi, On a quotient category . . . . . . . . . . . . . . . . . . . . . . 17

 

Graţiela Cicortaş, Categorical sequences and applications . . . . . . . . . . . . . . .. . . . . . . 31

 

Tallat El Sayed Ali El Danaf, Numerical solution of the Korteweg -

De Vries Burgers equation by using Quintic spline method . . . . . . . . . . . . . . .. . . . . . . 41

 

Dorina Răducanu, On uniformly convex mappings of a Banach space into the

complex plane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

 

Dorina Răducanu and Paula Curt, An univalence condition . . . . . . . . . . . . . . . . . . . .. . 61

 

Milena Solomon, Cubature formulas on triangle . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . 67

 

Tiberiu Trif, An existence uniqueness theorem for an integral equation

modelling infectious diseases . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

 

Liana Ţopan, Critical and vector critical sets in the plane . . . . . . . . . . . . . . . . . . . . . . 83

 

Book reviews . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97