Results 21 to 30 of about 23,096 (258)

Periodic solutions of systems with asymptotically even nonlinearities [PDF]

open access: yes, 2010
New conditions of solvability based on a general theorem on the calculation of the index at infinity for vector fields that have degenerate principal linear part as well as degenerate ... next order ...
Kloeden, Peter E.   +1 more
core   +1 more source

On some approximate calculations for certain pseudo-differential equations

open access: yesҚарағанды университетінің хабаршысы. Математика сериясы, 2018
We consider discrete pseudo - differential operatots and equations as approximate operators and equations for their continuous analogues. For this purpose we study a solvability for such equations in appropriate discrete spaces and give some error ...
V.B. Vasilyev
doaj   +1 more source

Analysis Methods Of The Insolvency Risk [PDF]

open access: yesRevista Română de Statistică, 2010
A company’s capacity to be solvent/able* – to defeat the insolvencyrisk, has an important position within the System of financial-patrimonial analysis. Any problem regarding the payment of obligatory taxes generates prejudice and requires urgent solving.
Gabriela Munteanu
doaj  

On solvability of nonlinear boundary value problems with integral condition for the system of hyperbolic equations

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2015
For system of hyperbolic equations of second order a nonlinear boundary value problem with integral condition is considered. By introducing new unknown functions the investigated problem is reduced to an equivalent problem involving one-parametered ...
Anar Assanova
doaj   +1 more source

The Solvability of a Class of Convolution Equations Associated with 2D FRFT

open access: yesMathematics, 2020
In this paper, the solvability of a class of convolution equations is discussed by using two-dimensional (2D) fractional Fourier transform (FRFT) in polar coordinates. Firstly, we generalize the 2D FRFT to the polar coordinates setting.
Zhen-Wei Li, Wen-Biao Gao, Bing-Zhao Li
doaj   +1 more source

The subspace Nevanlinna interpolation problem and the most powerful unfalsified model [PDF]

open access: yes, 1997
A generalization of the tangential Nevanlinna interpolation problem will be studied from a behavioral point of view. Necessary and sufficient conditions for its solvability and a characterization of art its solutions are derived.
Willems, JC   +3 more
core   +1 more source

Эредитарная маломодовая модель динамо

open access: yesVestnik KRAUNC: Fiziko-Matematičeskie Nauki, 2021
В данной статье рассматривается модель динамо в виде двумерной динамической системы в интегро-дифференциальной форме. В модели реализован стабилизирующий генерацию поля механизм обратной связи в виде подавления α-эффекта функционалом сверточного типа от ...
Казаков, Е.А.
doaj   +1 more source

Primal-Dual Bilinear Programming Solution of the Absolute Value Equation [PDF]

open access: yes, 2011
We propose a finitely terminating primal-dual bilinear programming algorithm for the solution of the NP-hard absolute value equation (AVE): Ax ? |x| = b, where A is an n n square matrix.
Olvi L. Mangasarian, Mangasarian, Olvi
core   +1 more source

Multi-Well Potentials in Quantum Mechanics and Stochastic Processes

open access: yesSymmetry, Integrability and Geometry: Methods and Applications, 2010
Using the formalism of extended N=4 supersymmetric quantum mechanics we consider the procedure of the construction of multi-well potentials. We demonstrate the form-invariance of Hamiltonians entering the supermultiplet, using the presented relation for ...
Victor P. Berezovoj   +2 more
doaj   +1 more source

On a New Criterion for the Solvability of Non-Simple Finite Groups and m-Abelian Solvability

open access: yes, 2021
This paper is devoted to introduce a sufficient condition for the solvability of finite groups. Also, it presents the concepts of m-abelian and m-cyclic solvability as new generalizations of solvability and polycyclicity, respectively.
Mohammad Abobala, Hasan Sankari
core   +1 more source

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