Vol. 54 (2025): Mathematics and Education in Mathematics

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Proceedings of the Fifty-Fourth Conference of the Union of Bulgarian Mathematicians, March 31 - April 4, 2025, Varna, Bulgaria

Published: 2025-03-27

Full Issue

Preface

Preface

Stanislav Harizanov

005-006
- PDF (Български)

Invited Talks

Lagrange multipliers in dynamic optimization

Mikhail Krastanov, Nadezhda Ribarska

009-017
- PDF
Brain-inspired models and their applications

Petia Koprinkova-Hristova

018-024
- PDF
The place of mathematics education in the world science

Kiril Bankov

025-036
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Section A: Mathematical Structures

One parametric representation of the generalized focal curve of a non-helical spherical curve

Cvetelina Dinkova, Radostina Encheva, Aynur Ali

039-045
- PDF
Probabilities for asymmetric p-outside values

Pavlina K. Jordanova

051-060
- PDF
On a problem from the book “Approximation of functions” by G. G. Lorentz

Teodora Zapryanova, Diko Souroujon

046-050
- PDF

Section B: Mathematical Modelling and Informatics

Ways to introduce optimization algorithms and mathematical modeling in the school mathematics course

Elitsa Atanasova

063-068
- PDF
Revolutionizing Peer-to-Peer Energy Trading with Blockchain Technology

Vitali Atias, Angel Georgiev, Vladimir Valkanov

069-077
- PDF
Functional model of PROs data collection system

Todor Branzov, Tsvetelin Zaevski

078-083
- PDF
Cloud-based corporate training model based on BPMN business process diagrams

Lilyana Rusenova, Elena Somova

084-090
- PDF
Numerical study of the hazardous factors of a ﬁre in a passenger railway car

Valentin Chochev, Svilena Arabadzhieva

091-100
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Section C: Education in Mathematics

Training on Haming code with the help of didactic tools – methodological and historical aspects

Daniel Denev

103-108
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A method for solving extremal problems in plane geometry

Ivaylo Dimitrov, Mehmed Kodzha

109-117
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Evaluating the eﬀectiveness of practical exercises in cryptography and authentication courses of cybersecurity education

Dilyana Dimitrova

118-124
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An overview and analysis of literature on mechanical methods for problem creation

Slavi Kadiev

125-142
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Opportunities of the astronomical observatory at the astronomical center of University of Shumen for steam education

Dragomir Marchev, Albena Ivanova-Nedelcheva, Nataliya Pavlova

143-149
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Application of project-based learning with gamiﬁcation using STEM cards

Sevinch Mustan

150-157
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Application of composition of dilations and dilation from point (Boutin’s theorems)

Julia Ninova

158-166
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Formation of metacognitive competences through creating games

Lyuba Petrova, Nataliya Pavlova

167-172
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Circumsphere and Insphere of a Polyhedron

Irena Parvanova, Vencislav Radulov

173-179
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Conic sections in geometric loci problems in mathematics proﬁled training

Penka Rangelova, Marta Teofilova, Daniela Georgieva

180-191
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Computer models for the study of pyramids with equal edges inscribed in a sphere

Toni Chehlarova, Georgi Gachev

192-198
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In memoriam

Raytcho Lazarov – mathematician, inspirer of future generations of mathematicians, a Man with a Capital “M” (1943 – 2024)

Petar Kenderov, Jenny Sendova

201-212
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Kerope Tchakerian (1944 – 2012)

Azniv Kasparian, Konstantin Tabakov

213-222
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Anniversaries

Jenny Sendova – an ongoing mathematical suite

Konstantin Delchev

225-232
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