**45**(2015)

ISSN 1787-5021 (Print)

ISSN 1787-6117 (Online)

## Content

### Research papers:

Almost geodesic mappings of affinely connected spaces that preserve the Riemannian curvature

by Vladimir Berezovski, Sándor Bácsó, Josef Mikeš

Pages: 3-10

On some identities for balancing and cobalancing numbers

by Paula Catarino, Helena Campos, Paulo Vasco

Pages: 11-24

Some inequalities for power series with nonnegative coefficients via a reverse of Jensen inequality

by Silvestru Sever Dragomir

Pages: 25-37

Visualization of univariate data for comparison

by Csaba Faragó

Pages: 39-53

Pell and Pell-Lucas numbers with only one distinct digit

by Bernadette Faye, Florian Luca

Pages: 55-60

On geometric Hermite arcs

by Imre Juhász

Pages: 61-68

On the right-continuity of infimal convolutions

by Gergely Pataki

Pages: 69-77

On weak symmetries of Kenmotsu Manifolds with respect to quarter-symmetric metric connection

by D. G. Prakasha, K. Vikas

Pages: 79-90

A note on the k-Narayana sequence

by José L. Ramírez, Víctor F. Sirvent

Pages: 91-105

A note on log-convexity of power means

by József Sándor

Pages: 107-110

A general strong law of large numbers and applications to associated sequences and to extreme value theory

by Harouna Sangare, Gane Samb LO

Pages: 111-132

### Methodological papers:

The experience of applying a method to develop the use of color theory

by Erika Perge

Pages: 135-149

Exploring Hermite interpolation polynomials using recursion

by Róbert Vajda

Pages: 151-160

Introduction of differential calculus in the class 10 with graphical calculator

by Ferenc Várady

Pages: 161-177