**37**(2010)

Dedicated to professor Béla Pelle on his 80th birthday

ISSN 1787-5021 (Print)

ISSN 1787-6117 (Online)

## Content

### Research papers:

Arithmetic progressions on quartic elliptic curves

by Alejandra Alvarado

Pages: 3–6

Non-integerness of class of hyperharmonic numbers

by Rachid Aït Amrane, Hacène Belbachir

Pages: 7–11

Conditions for groups whose group algebras have minimal Lie derived length

by Zsolt Balogh, Tibor Juhász

Pages: 13–20

Regularity of certain Banach valued stochastic processes

by A. L. Barrenechea

Pages: 21–38

Periodic fixed points of random operators

by Ismat Beg, Mujahid Abbas, Akbar Azam

Pages: 39–49

Evaluating a probabilistic model checker for modeling and analyzing retrial queueing systems

by Tamás Bérczes, Gábor Guta, Gábor Kusper, Wolfgang Schreiner, János Sztrik

Pages: 51–75

On the skeleton of a finite transformation semigroup

by Attila Egri-Nagy, Chrystopher L. Nehaniv

Pages: 77–84

On the best estimations for dispersions of special ratio block sequences

by Ferdinánd Filip, Kálmán Liptai, Ferenc Mátyás, János T. Tóth

Pages: 85–93

Some inequalities for q-polygamma function and ζ_{q}-Riemann zeta functions

by Valmir Krasniqi, Toufik Mansour, Armend Shaban Shabani

Pages: 95–100

Polynomials with special coefficients

by Ferenc Mátyás, Kálmán Liptai, János T. Tóth, Ferdinánd Filip

Pages: 101–106

On perfect numbers which are ratios of two Fibonacci numbers

by Florian Luca, V. Janitzio Mejia Huguet

Pages: 107–124

Properties of balancing, cobalancing and generalized balancing numbers

by Péter Olajos

Pages: 125–138

Signed (k,k)-domatic number of a graph

by Seyed Mahmoud Sheikholeslami, Lutz Volkmann

Pages: 139–149

Algebraic and transcendental solutions of some exponential equations

by Jonathan Sondow, Diego Marques

Pages: 151–164

Geometric properties and constrained modification of trigonometric spline curves of Han

by Ede M. Troll, Miklós Hoffmann

Pages: 165–175

CTH B-spline curves and its applications

by Jin Xie, Jieqing Tan, Shengfeng Li

Pages: 177–189

### Methodological papers:

Solving certain quintics

by Raghavendra G. Kulkarni

Pages: 193–197

Spatial Ability, Descriptive Geometry and Dynamic Geometry Systems

by Rita Nagy-Kondor

Pages: 199–210

C++ exam methodology

by Norbert Pataki, Zalán Szűgyi

Pages: 211–223

The software developers’ view on product metrics — A survey-based experiment

by István Siket, Tibor Gyimóthy

Pages: 225–240

Mathematical competences examined on secondary school students

by Ilona Téglási

Pages: 241–257