Vol. 81 No. 2 (2025)

• Pavlo Knopov: The scientific path and the formation of the Kyiv school of stochastic optimization

  Vadym Ponomarov, Volodymyr Morenets, Iryna Rozora, Mykhailo Sharapov, Ruslan Chornei, Alexander Slabospitsky

  7-11

  • PDF

Algebra, Geometry and Probability Theory

• Matrix representations of iterated wreath products of one-dimensional Lie algebras

  Nataliia Bondarenko, Ievgen Bondarenko

  12-18

  • PDF

• Prediction formulas for integrated fractional Brownian motion

  Yevhenii Bundiuk, Yuliya Mishura, Enrica Pirozzi

  19-30

  • PDF

• Prognostic logistic regression model for assessing indications for therapeutic implantation with gastric prolapse into the esophagus or the cardiac part of the stomach

  Oleksandr Halushko

  31-35

  • PDF

• Continuous transformations preserving tails of negabinary representations of numbers from unit interval

  Volodymyr Yelahin

  36-40

  • PDF

• Bandwidth selection for density estimation by mixture with varying concentrations

  Rostyslav Maiboroda, Olena Sugakova

  41-46

  • PDF

• Interpolation problem for multidimensional harmonizable stable sequences

  Oleksandr Masyutka, Mikhail Moklyachuk

  47-59

  • PDF

• Limit theorems for generalized convex hulls

  Mykyta Sadok

  73-81

  • PDF

• Improvement of characterization inequality for norms of  φ-sub-Gaussian random variable

  Dmytro Tykhonenko, Rostyslav Yamnenko, Katalin Kuchinka

  82-86

  • PDF

Differential equations, mathematical physics and mechanics

• Topological structure of simple Hamiltonian flows on the projective plane and the Klein bottle

  Oleksandr Prishlyak, Kateryna Butok

  60-72

  • PDF

• Axisymmetric poroelasticity problem for a multilayered cylinder

  Natalya Vaysfeld, Zinaida Zhuravlova

  87-90

  • PDF

• Effect of smoothing of a finite wedge-shaped object on the scattering characteristics of a plane wave. Part II. Analysis of numerical results

  Viktor Grinchenko, Iryna Lebedyeva, Volodymyr Matsypura, Tihomir Trifonov

  91-94

  • PDF

• Analysis of the acoustic emission of a modified segment of a wind turbine blade with a NACA 0012 airfoil

  Andrii Dreus, Vitalii Derbaba, Dmytro Harkavenko, Serhii Aleksieienko

  95-100

  • PDF

• Technology for laser thermoforming of thin-walled metal structural elements

  Prof. Yaroslav A. Zhuk, Arash Soleiman Fallah

  101-104

  • PDF

• Uniform attractors and asymptotic gain property for the PDE-ODE system

  Oleksiy Kapustyan, Taras Yusypiv, Yuriy Perestyuk, Zoia Khaletska

  105-112

  • PDF

• Modeling of sound propagation in a planar waveguide with rounded bends

  Yaroslav P. Trotsenko, Volodymyr V. Kuzmenko

  113-116

  • PDF

• Parametric identification of asset dynamic models

  Victor Kulian, Olena Yunkova, Maryna Korobova

  117-121

  • PDF

• Method of experimental modeling of penetration of high-velocity impact elements in armor materials

  Mykola Melnichenko, Leonid Yarovoi, Natalia Puchko, Mykhailo Vodotovka

  122-125

  • PDF

• The unsteady contact interaction of a rotating stiff finite cylinder and elastic half-space with frictional heat generation

  Volodymyr Onyshkevych, Galyna Barabash

  126-129

  • PDF

• Fundamental solution of the Cauсhy problem for the dissipative ultraparabolic Kolmogorov equation with coefficients independent on variable degeneration

  Halyna Pasichnyk

  130-137

  • PDF

• Mathematical problems of feature matching for vision-guided vehicles with limited resources

  Oleh Samoilenko

  138-141

  • PDF

• Analysis of the effectiveness of combining high-and low-thrust engines in Earth – Mars flights

  Oleksii Kharytonov, Oleksii Kutsenko, Anastasiia Kutsenko

  142-145

  • PDF

• Boundedness of solutions of the first order linear multidimensional difference equations

  Andrii Сhaikovs'kyi, Oleksandr Liubimov, Oksana Lahoda

  146-154

  • PDF

• Nonasymptotic bounds on return degradation for OBD-pruned neural controllers

  Maksym Shamrai

  155-158

  • PDF

Computer Science and Informatics

• Optimization of the canonical Huffman codes for word-based natural language text compression

  Igor Zavadskyi, Maksym Kovalchuk

  159-165

  • PDF

• Architecture and functional capabilities of a platform for automated web application testing

  Danyil Lipskyi

  166-173

  • PDF

• Hysteresis strategy for a single-channel system with a queue and repeated calls

  Igor Makushenko, Iryna Usar, Hanna Livinska

  174-181

  • PDF

• Choosing the optimal strategy for a discrete dynamic cooperative game

  Viacheslav Tsurkan, Sergiy Martyniuk

  182-186

  • PDF

• Architecture of a social media bot detection system

  Mykhailo Makhno, Oleksii Fedorus, Oleksandr Borysenko, Maksym Veremchuk

  187-192

  • PDF

• Dialog style transfer with parameter-efficient fine-tuning

  Ruslan Pravosud, Oleksandr Marchenko

  193-196

  • PDF

• Least squares method of relative errors for parameter estimation of systems under non-classical assumptions

  Alexander Slabospitsky

  197-201

  • PDF

• Three-dimensional problems of controlling the dynamics of incompletely observed thick elastic plates. Part II. The case of discretely specified desired condition

  Volodymyr Stoyan, Dmytro Cherniy, Serhii Voloshchuk, Roman Zatorsky

  202-210

  • PDF

• Algorithm for recognizing simple graphs by a collective of agents

  Andrij Stopkin, Tetiana Turka

  211-216

  • PDF

• The application of machine learning methods in modern cancer therapy

  Ivan Tiurdo, Natalya Kizilova

  217-226

  • PDF

Modern Physics

• Correlation between the fractal dimension of surface texture and its laser speckles as the basis for a non-contact method for analyzing ceramic materials

  Andrii Yakunov, Volodymyr Dibrov, Artem Sachko

  227-231

  • PDF