Article-Journal

Implementation of hyperbolic complex numbers in Julia language

Hyperbolic complex numbers are used in the description of hyperbolic spaces. One of the well-known examples of such spaces is the Minkowski space, which plays a leading role in the …

anna-vladislavovna-korolkova

Multistage pseudo-spectral method (method of collocations) for the approximate solution of an ordinary differential equation of the first order

The classical pseudospectral collocation method based on the expansion of the solution in a basis of Chebyshev polynomials is considered. A new approach to constructing systems of …

konstantin-petrovich-lovetskiy

Computer Algebra in JULIA

Recently, the place of the main programming language for scientific and engineering computations has been little by little taken by Julia. Some users want to work completely within …

dmitry-sergeevich-kulyabov

Using a Template Engine as a Computer Algebra Tool

In research problems that involve the use of numerical methods for solving systems of ordinary differential equations (ODEs), it is often required to select the most efficient …

migran-nelsonovich-gevorkyan

Comparative analysis of machine learning methods by the example of the problem of determining muon decay

The history of using machine learning algorithms to analyze statistical models is quite long. The development of computer technology has given these algorithms a new breath. …

migran-nelsonovich-gevorkyan

Hyperbolic numbers as Einstein numbers

In the special theory of relativity (SR) it is usual to highlight so-called paradoxes. One of these paradoxes is the formal appearance of speed values grater then the light speed. …

dmitry-sergeevich-kulyabov

One-step Stochastization Methods for Open Systems

In this paper, two approaches (combinatorial and operatorial) to the stochastization of the one-step processes are discussed for the closed and open version of the Lotka–Volterra …

anna-vladislavovna-korolkova

A Practical Approach to Testing Random Number Generators in Computer Algebra Systems

This paper has a practical aim. For a long time, implementations of pseudorandom number generators in standard libraries of programming languages had poor quality. The situation …

migran-nelsonovich-gevorkyan

A Modular Extension for a Computer Algebra System

Computer algebra systems are complex software systems that cover a wide range of scientific and practical problems. However, the absolute coverage cannot be achieved. Often, it is …

migran-nelsonovich-gevorkyan

Numerical modeling of stationary pseudospin waves on a graphene monoatomic films

For the first time, the theoretical model of the spin-electron structure of a singlelayer graphene film was proposed by Wallace. The literature also describes ferromagnetism …

le-anh-nhat

Mathematical model of cavitation under the influence of a single stretching pulse

This paper describes the created mathematical model that allows you to explore the dynamics of cavitation bubbles under the influence of a single negative pressure pulse. The time …

nikolay-yurievich-kravchenko

A new algorithm used the Chebyshev pseudospectral method to solve the nonlinear second-order Lienard differential equations

This article presents a numerical method to determine the approximate solutions of the Lienard equations. It is assumed that the second-order nonlinear Linard differential …

le-anh-nhat

Statistically significant performance testing of Julia scientific programming language

In this article, we compare the support for SIMD instructions for Julia and Fortran. The comparison is carried out according to the methodology described in work of T. Kalibera, R. …

migran-nelsonovich-gevorkyan

New Features in the Second Version of the Cadabra Computer Algebra System

In certain scientific domains, there is a need for tensor operations. To facilitate tensor computations, computer algebra systems are employed. In our research, we have been using …

dmitry-sergeevich-kulyabov

Two Formalisms of Stochastization of One-Step Models

To construct realistic mathematical models from the first principles, the authors suggest using the stochastization method. In a number of works different approaches to …

dmitry-sergeevich-kulyabov

Simple Model of Nonlinear Spin Waves in Graphene Structures

A series of theoretical and experimental works is known which investigated the magnetic properties of graphene structures. This is due, among other things, to the prospects of …

dmitry-sergeevich-kulyabov

Regularized Computation of Oscillatory Integrals with Stationary Points

Ability to calculate integrals of rapidly oscillating functions is crucial for solving many problems in optics, electrodynamics, quantum mechanics, nuclear physics, and many other …

konstantin-petrovich-lovetskiy

Implementing a Method for Stochastization of One-Step Processes in a Computer Algebra System

When modeling such phenomena as population dynamics, controllable flows, etc., a problem arises of adapting the existing models to a phenomenon under study. For this purpose, we …

migran-nelsonovich-gevorkyan

The approach to investigation of the the regions of self-oscillations

Self-oscillating modes in control systems of computer networks quite negatively affect the characteristics of these networks. The problem of finding the areas of self-oscillations …

tatyana-refatovna-velieva

Spinor Representation of Maxwell's Equations

Spinors are more special objects than tensor. Therefore possess more properties than the more generic objects such as tensors. Thus, the group of Lorentz two-spinors is the …

dmitry-sergeevich-kulyabov