Журнал СФУ. Математика и физика. Journal of SibFU. Mathematics & Physics: Recent submissions
Now showing items 21-40 of 1061
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Uniform Estimates for Mittag-Leffler Functions with Smooth Phase
(Сибирский федеральный университет. Siberian Federal University, 2023-10)In this paper we consider the problem on uniform estimates for Mittag–Leffler functions with the smooth phase functions having singularities D1, D 4 and Ar. The generalisation is that we replace the exponential ... -
Criterion of Global Admissibility for Logic IPC
(Сибирский федеральный университет. Siberian Federal University, 2023-10)We describe globally admissible inference rules for logic IPC -
An Inverse Problem for Pseudoparabolic Equation with the Mixed Boundary Condition
(Сибирский федеральный университет. Siberian Federal University, 2023-10)In this paper we study the inverse problem on identification of the leading coefficient in the pseudoparabolic equation. The problem involves the mixed boundary condition. The unknown coefficient is recovered by additional ... -
Mathematical Modeling of Cathodic Zinc Electroextraction Processes
(Сибирский федеральный университет. Siberian Federal University, 2023-10)Numerical optimization techniques are widely used for solving applied problems in economics, as well as problems related to the optimization of production processes. In this paper, the Hooke-Jeeves method of direct search ... -
Contact Mappings of Jet Spaces
(Сибирский федеральный университет. Siberian Federal University, 2023-10)In this paper we consider mappings of jet spaces that preserve the module of canonical Pfaffian forms, but are not generally invertible. These mappings are called contact. A lemma on the prolongation of contact mappings ... -
On the Solvability of a Burgers-type Equation with a Specia Type of Nonlinearity
(Сибирский федеральный университет. Siberian Federal University, 2023-10)This paper considers a one-dimensional parabolic Burgers equation of special form with Cauchy data. When proving the theorem on the solvability of this problem, we used the method of weak approximation developed by Yu.Ya. ... -
Effect of Permittivity on the Ionic Boundary Layer upon Protonation of Lithium Niobate
(Сибирский федеральный университет. Siberian Federal University, 2023-10)The paper presents the results of a numerical study of the behavior of proton exchange reaction products after they enter benzoic acid, which interacts with a lithium niobate crystal. The theoretical model based on the ... -
Two Heuristic Algorithms for RCPSP with NPV Criterion
(Сибирский федеральный университет. Siberian Federal University, 2023-10)The resource constrained project scheduling problem (RCPSP) with the criterion of max- imizing the net present value (NPV) is considered. We propose two heuristic algorithms for RCPSP based on idempotent algebra methods. ... -
Green Function of Quantum Particle Moving in Two-dimensional Annular Potential
(Сибирский федеральный университет. Siberian Federal University, 2023-10)In this work, we present a new result which concerns the obtainment of the Green function relative to the time-independent Schrodinger equation in two dimensional space. The system considered in this work is a particle ... -
Investigation of the Effect of Air Admission on the Vortex Structure of the Flow in a Tangential Chamber
(Сибирский федеральный университет. Siberian Federal University, 2023-10)In the work, numerical simulations of a turbulent swirling flow in a model tangential chamber were performed. Depending on the swirl number and water flow discharge, various flow regimes are observed: a column vortex, a ... -
Modeling of Electric Field Impact on a Cholesteric Liquid Crystal Layer
(Сибирский федеральный университет. Siberian Federal University, 2023-08)A new mathematical model is proposed to describe the spatial static state of a cholesteric liquid crystal. The model is constructed with the assumption of elastic resistance of a liquid crystal under weak mechanical ... -
Series of Hypergeometric Type and Discriminants
(Сибирский федеральный университет. Siberian Federal University, 2023-08)The monomial of solutions to a reduced system of algebraic equations are a hypergeometric type series. We are spreading the Horn–Karpranov result (for hypergeometric series) to the case of series of hypergeometric type -
Local Asymptotic Normality of Statistical Experiments in an Inhomogeneous Competing Risks Model under Random Censoring on the Right
(Сибирский федеральный университет. Siberian Federal University, 2023-08)The local asymptotic normality property of the likelihood ratio statistic in the competing risk model that corresponds to inhomogeneous and randomly right-censored observations is proved in the paper -
Analog of theWeierstrass Theorem and the Blaschke Product for A(z)-analytic Functions
(Сибирский федеральный университет. Siberian Federal University, 2023-08)We consider A(z)-analytic functions in the case when A(z) is an antiholomorpic function. For A(z)-analytic functions analogs of the Weierstrass theorem and of the Blaschke theorem are proved -
Strongly Algebraically Closed MV-algebras
(Сибирский федеральный университет. Siberian Federal University, 2023-08)The aim of this paper is to fully characterize strongly algebraic closed MV-algebras, extending a result of Lacava. Moreover we provide some computation relating orbit algebras, Wajsberg algebras and Lukasiewicz semirings -
On Generation of the Groups GLn(Z) and PGLn(Z) by Three Involutions, Two of which Commute
(Сибирский федеральный университет. Siberian Federal University, 2023-08)It is proved that the general linear group GLn(Z) (its projective image PGLn(Z) respectively) over the ring of integers Z is generated by three involutions, two of which commute, if and only if n > 5 (if n = 2 and n > 5 ... -
Some New Fixed Point Results in b-metric Space with Rational Generalized Contractive Condition
(Сибирский федеральный университет. Siberian Federal University, 2023-08)In this paper, we improve and generalize several results in fixed point theory to the b-metric space. Where we confirm the existence of the fixed point for self mapping T satisfying some rational contractive conditions. ... -
Almost Inner Derivations of Some Leibniz Algebras
(Сибирский федеральный университет. Siberian Federal University, 2023-08)The present paper is devoted to almost inner derivations of thin and solvable Leibniz algebras. Namely, we consider a thin Lie algebra, solvable Lie algebra with nilradical natural graded filifform Lie algebra, natural ... -
On a Note on Ap´ery-like Series with an Application
(Сибирский федеральный университет. Siberian Federal University, 2023-08)The goal of this note is to use a hypergeometric series strategy to build many Ap´ery-like series. As an application, we obtain several results due to Sherman -
On the Convergence Exponent of the Special Integral of the Tarry Problem for a Quadratic Polynomial
(Сибирский федеральный университет. Siberian Federal University, 2023-08)In this paper it is considered the summation problem for trigonometric integrals with quadratic phase. This problem was considered in the papers [7–9] in particular cases. Our results generalize the results of those ...