**52**(2020)

ISSN 1787-6117 (Online)

## Content

### Research papers:

A static analysis method for safe comparison functors in C++

by Bence Babati, Norbert Pataki

Pages: 5–18

DOI: 10.33039/ami.2020.12.003

Convergence of positive series and ideal convergence

by Vladimír Baláž, Kálmán Liptai, János T. Tóth, Tomáš Visnyai

Pages: 19–30

DOI: 10.33039/ami.2020.05.005

Integer sequences and ellipse chains inside a hyperbola

by Hacène Belbachir, László Németh, Soumeya Merwa Tebtoub

Pages: 31–37

DOI: 10.33039/ami.2020.06.002

On two four term arithmetic progressions with equal product

by Andrew Bremner

Pages: 39–55

DOI: 10.33039/ami.2020.02.001

A note on dual third-order Jacobsthal vectors

by Gamaliel Cerda-Morales

Pages: 57–70

DOI: 10.33039/ami.2020.05.003

Binary quadratic forms and sums of powers of integers

by José Luis Cereceda

Pages: 71–84

DOI: 10.33039/ami.2020.02.002

A sum of negative degrees of the gaps values in 2 and 3-generated numerical semigroups

by Leonid G. Fel, Takao Komatsu, Ade Irma Suriajaya

Pages: 85–95

DOI: 10.33039/ami.2020.08.001

Combinatorial sums associated with balancing and Lucas-balancing polynomials

by Robert Frontczak, Taras Goy

Pages: 97–105

DOI: 10.33039/ami.2020.10.002

Markov triples with k-generalized Fibonacci components

by Carlos A. Gómez, Jhonny C. Gómez, Florian Luca

Pages: 107–115

DOI: 10.33039/ami.2020.06.001

Thickness distribution of Boolean functions in 4 and 5 variables and a comparison with other cryptographic properties

by Mathias Hopp, Pål Ellingsen, Constanza Riera, Pantelimon Stănică

Pages: 117–135

DOI: 10.33039/ami.2020.10.004

Pentagonal and heptagonal repdigits

by Bir Kafle, Florian Luca, Alain Togbé

Pages: 137–145

DOI: 10.33039/ami.2020.09.002

Generalisation of the rainbow neighbourhood number and k-jump colouring of a graph

by Johan Kok, Sudev Naduvath, Eunice Gogo Mphako-Banda

Pages: 147–158

DOI: 10.33039/ami.2020.02.003

Ellipse chains inscribed inside a parabola and integer sequences

by Giovanni Lucca

Pages: 159–166

DOI: 10.33039/ami.2020.09.001

Efficiently parallelised algorithm to find isoptic surface of polyhedral meshes

by Ferenc Nagy

Pages: 167–181

DOI: 10.33039/ami.2020.05.002

Analysing the vegetation of energy plants by processing UAV images

by Melinda Pap, Sándor Király, Sándor Molják

Pages: 183–197

DOI: 10.33039/ami.2020.01.001

Optimized line and line segment clipping in E2 and Geometric Algebra

by Vaclav Skala

Pages: 199–215

DOI: 10.33039/ami.2020.05.001

Fuzzification of training data class membership binary values for neural network algorithms

by Tibor Tajti

Pages: 217–228

DOI: 10.33039/ami.2020.10.001

New voting functions for neural network algorithms

by Tibor Tajti

Pages: 229–242

DOI: 10.33039/ami.2020.10.003

On the exponential Diophantine equation (4m^{2} + 1)^{x} + (21m^{2} − 1)^{y} = (5m)^{z}

by Nobuhiro Terai

Pages: 243–253

DOI: 10.33039/ami.2020.01.003

Simulation of the performance of Cognitive Radio Networks with unreliable servers

by Mohamed Hedi Zaghouani, János Sztrik, Arban Uka

Pages: 255–265

DOI: 10.33039/ami.2020.01.002

### Methodological papers:

Cooperative learning methods in mathematics education – 1.5 year experience from teachers’ perspective

by Tünde Berta, Miklós Hoffmann

Pages: 269–279

DOI: 10.33039/ami.2020.12.002

A survey on the global optimization problem using Kruskal–Wallis test

by Viliam Ďuriš, Anna Tirpáková

Pages: 281–298

DOI: 10.33039/ami.2020.05.004

The education and development of mathematical space concept and space representation through fine arts

by Rita Kiss-György

Pages: 299–307

DOI: 10.33039/ami.2020.12.001

Students’ non-development in high school geometry

by Csaba Szabó, Csilla Bereczky-Zámbó, Anna Muzsnay, Janka Szeibert

Pages: 309–319

DOI: 10.33039/ami.2020.12.004