Anul LI 2006

 

S T U D I A

UNIVERSITATIS BABEŞ-BOLYAI

 

 

MATHEMATICA

3

 

 

 

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

 

 

 

SUMAR CONTENTS SOMMAIRE

 

 

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

 

Wolfgang W. Breckner and Tiberiu Trif, Equicontinuity and Singularities of Families

of Monomial Mappings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

 

Edwin Castro and Vernor Arguedas, Periodic and Almost Periodic Functions .. . . . . .31

 

Gh. Coman, A. Oprişan and I. Somogyi, Optimal Quadrature Formulas with Respect

to the Error . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

 

Rodica Covaci, Homomorphs with Respect to which any Hall π-Subgroup

of a Finite π-Solvable Group is a Projector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51

 

Adrian Diaconu, On Certain Properties of the Frechet Differential of Higher

Order . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61

 

D. Inoan and J. Kolumban, Two Existence Results for Variational Inequalities . .. . . . 85

 

Costică Mustăţa, On the Converses of the Reduction Principle in Inner

Product Spaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . 97

 

Ion Păvăloiu, Bilateral Approximations of Solutions of Equations by Order Three

Steffensen-Type Methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

Ioan A. Rus, Metric Space with Fixed Point Property with Respect

to Contractions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . 115

 

Book Reviews . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . 122