On numerical solution of the second-order linear Fredholm-Stieltjes integral equation

Avıt ASANOV

In this framework, the necessary and sufficient conditions for the existence and uniqueness of the second-order linear Fredholm-Stieltjes-integral equations, u(x) = lambda integral(b)(a) K(x, y) u(y) dg(y) + f(x), x is an element of[a, b], are thoroughly derived. Moreover, instead of approximating the integral equation by different numbers of partition n, the optimal number n for the given error tolerance is established. The system of equations is implemented in MAPLE for the Runge method. An efficient scheme is proposed for second-order integral equations. The solution has been compared with ...Более

Solving a System of Linear Algebraic Equations with a Tridiagonal Matrix: A New Look at Cramer's Rule

Anarkül URDALETOVA

To numerically solve a system of linear algebraic equations with a tridiagonal matrix, a recursive version of Cramer's rule is proposed. This method requires no additional restrictions on the matrix of the system similar to those formulated for the double-sweep method. The results of numerical experiments on a large set of test problems are presented. A comparative analysis of the efficiency of the method and corresponding algorithms is given.

Решение системы линейных алгебраических уравнений с трехдиагональной матрицей: новый взгляд на метод Крамера

Anarkül URDALETOVA

Для численного решения системы линейных алгебраических уравнений с трехдиагональной матрицей в работе предлагается рекурсивный вариант метода Крамера. Предлагаемая методика не требует дополнительных ограничений на матрицу системы, подобных тем, которые формулируются для метода прогонки. Приводятся результаты численных эксперименты, в рамках которых на большом наборе тестовых задач проводится сравнительный анализ эффективности предлагаемой методики и соответствующих алгоритмов.

Задача восстановления ядра и правой части интегро-дифференциального уравнения в частных производных пятого порядка

Avıt ASANOV

Longitudinal study of Kyrgyz students’ general physics course performance in paper-based versus online–based tests

Azat AKMATBEKOVA | Gülşat MUHAMETJANOVA

This study was conducted to examine students' performance in paper-based and online-based tests. In the context of the study, students' performances were considered in the General Physics course between 2014 and 2015 and 2018-2019 academic years. The participants of this study are 417 students of Engineering and Science faculties at a public university of Kyrgyz Republic. Students' achievement scores in paper-based and online-based tests were obtained and appropriate statistical analysis methods were employed. According to the results, students' demographic data (i.e. gender, faculty and major ...Более

The Fekete-Szegö inequality for subclasses of analytic functions related to modified Sigmoid functions

Muhammet KAMALİ

In this paper, the authors investigate the initial coefficient bounds for a new generalized subclass of analytic functions related to Sigmoid functions. Also, the relevant connections with the famous classical Fekete?Szegö inequality for these classes are discussed.

On One Class of Nonclassical Linear Volterra Integral Equations of the First Kind

Avıt ASANOV

On the basis of a new approach, we prove the uniqueness theorem and construct Lavrent'ev's regularizing operators for the solution of nonclassical linear Volterra integral equations of the first kind with nondifferentiable kernels.

A certain subclass of bi-univalent functions associated with Bell numbers and q-Srivastava Attiya operator

Muhammet KAMALİ

In the present study, we introduced general a subclass of bi-univalent functions by using the Bell numbers and q-Srivastava Attiya operator. Also, we investigate coefficient estimates and famous Fekete-Szego inequality for functions belonging to this interesting class.

The Dieudonne tau-complete spaces and free topological groups of uniform spaces

Asılbek ÇEKEEV

For a Tychonoff space X, the Dieudonne tau-completion of X, denoted by mu TX, is investigated. The space mu TX is defined as the completion of X with respect to the uniformity uTX, where uTX is generated by all continuous mappings of X to metric spaces of weight

On the Recursive Sequence x(n+!) = x(n-14) / [1 + x(n-2) x(n-5) x(n-8) x(n-11)]

Burak OĞUL

In this paper, given solutions fort he following difference equation x(n+!) = x(n-14) / [1 + x(n-2) x(n-5) x(n-8) x(n-11)] where the initial conditions are positive real numbers. The initial conditions of the equation are arbitrary positive real numbers. We investigate periodic behavior of this equation. Also some numerical examples and graphs of solutions are given.

One Class of Systems of Linear Fredholm Integral Equations of the Third Kind on the Real Line with Multipoint Singularities

Avıt ASANOV

Using a modification of the approach previously developed by the authors, we show that finding solutions of one class of systems of linear Fredholm integral equations of the third kind on the real line with finitely many multipoint singularities is equivalent to finding solutions of a system of linear Fredholm integral equations of the second kind on the real line with additional conditions imposed on the kernels and the free term. The existence, nonexistence, uniqueness, and nonuniqueness of solutions of systems in this class are studied.

Uniqueness of the solution of one class of Volterra-Stieltjes linear integral equations of the third kind = Единственность решения одного класса линейных интегральных уравнений Вольтерра-Стилтьеса третьего рода

Avıt ASANOV | Kalıskan MATANOVA | Eliza Apsamat Kızı

In this paper, the question of uniqueness of the solution for one class of Volterra-Stieltjes linear integral equations of the third kind is investigated. The notion of derivative with respect to an increasing function was introduced by A. Asanov in 2001 and plays special role in the study. This notion is a generalization of the usual concept of a derivative function and is an inverse operator for one class of the Stieltjes integral. Basing on idea of such derivative, using the method of integral transformations and the method of non-negative quadratic forms, the uniqueness theorems for the so ...Более