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О топологической классификации потоков Морса-Смейла на поверхностях при помощи функции Ляпунова
Журнал Средневолжского математического общества. 2014. Т. 16. № 3. С. 36-40.
Gurevich E., Kurenkov E.
We introduce the denition of consistent equivalence of Meyer ξ -functions for Morse- Smale ows on surfaces (that are Lyapunov funñtions) and state that consistent equivalence of ξ -functions is necessary and sucient condition for such ows.
Pochinka O., Shubin D., / Cornell University. Series math "arxiv.org". 2022.
In the present paper, non-singular Morse-Smale flows on closed orientable 3-manifolds under the assumption that among the periodic orbits of the flow there is only one saddle one and it is twisted are considered. An exhaustive description of the topology of such manifolds is obtained. Namely, it has been established that any manifold admitting such ...
Added: January 30, 2023
Grines V., Gurevich E., Kurenkov E., Математические заметки 2020 Т. 107 № 1 С. 145-148
In the paper the topological classification of gradient-like flows on mapping tori is obtained. Such flows naturally appear in the modelling of processes with at least on cyclic coordinate. ...
Added: October 17, 2019
Kurenkov E., Gurevich E., Труды Средневолжского математического общества 2015 Т. 17 № 2 С. 15-26
We introduce the definition of consistent equivalence of energy Morse-Bott functions for Morse-Smale flows on surfaces and state that consistent equivalence of that functions is necessary and sufficient condition for such flows. ...
Added: October 12, 2015
Gurevich E., Журнал Средневолжского математического общества 2017 Т. 19 № 2 С. 25-30
This paper is the first step in stydying structure of decomposition of phase space with dimension n≥4" role="presentation" style="position: relative;">n≥4n≥4n\geq 4 on the trajectories of Morse-Smale flows (structurally stable flows with non-wandering set consisting of finite number of equilibria and closed trajectories) allowing heteroclinic intersections. More precisely, special class of Morse-Smale flows on the sphere ...
Added: October 10, 2017
Gurevich E., Павлова Д. А., Журнал Средневолжского математического общества 2018 Т. 20 № 4 С. 378-383
We study a structure of four-dimensional phase space decomposition on trajectories of Morse-Smale flows admitting heteroclinical intersections. We consider a class $G(S^4)$ of Morse-Smale flows on the sphere $S^4$ such that for any flow $f\in G(S^4)$ its non-wandering set consists of exactly four equilibria: source, sink and two saddles. Wandering set of such flows ...
Added: November 11, 2018
Grines V., Gurevich E., Математический сборник 2023 Т. 214 № 5 С. 97-127
We obtain necessary and sufficient conditions for the topological equivalence of gradient-like flows without heteroclinic intersections, defined on a connected sum of a finite number of manifolds homeomorphic to $\mathbb{S}^{n-1}\times \mathbb{S}^1$, $ n\geq 3$. For the case $n>3$, this result essentially extends the class of manifolds for which the topological classification of structurally stable systems ...
Added: December 11, 2022
Pochinka O., Shubin D., / Cornell University. Серия math "arxiv.org". 2021.
In the present paper the exhaustive topological classification of nonsingular Morse-Smale flows of n-manifolds with two limit cycles is presented. Hyperbolicity of periodic orbits implies that among them one is attracting and another is repelling. Due to Poincare-Hopf theorem Euler characteristic of closed manifold Mn which admits the considered flows is equal to zero. Only torus and Klein ...
Added: December 3, 2021
В. З. Гринес, Е. Я. Гуревич, Успехи математических наук 2022 Т. 77 № 4(466) С. 201-202
A result on the possibility of a complete topological classification of gradient-like flows without heteroclinic intersections, given on a manifold of dimension $n\geq 3$, homeomorphic to the connected sum $\S^{n-1}\times S^1$ is provided. This result significantly extends the class of structurally stable flows for which a topological classification has been obtained. ...
Added: June 24, 2022
Gurevich E., Труды Средневолжского математического общества 2015 Т. 17 № 3 С. 120-126
We define a class of gradient-like diffeomorphisms that can be presented as local products of diffeomorphisms on the circle and on a surface, provide their topological classification and specify topology of the ambient manifold. ...
Added: December 4, 2015
Grines V., Gurevich E., Pochinka O., Математические заметки 2019 Т. 105 № 1 С. 136-141
We provide a definition of a two-colored graph of a Morse-Smale diffeomorphism without heteroclinical intersection defined on the sphere $S^n$, $n\geq 4$ and prove that this graph is the complete topological invariant for such diffeomorphisms. ...
Added: October 13, 2018
Gurevich E., Chernov A., Ivanov A., Динамические системы 2020 Vol. 10 No. 2 P. 129-138
Manifolds admitting a Morse function with three critical points are called projective-like, by analogy with the projective plane. Eells and Kuiper showed that the dimension n of such manifolds takes on the values 2, 4, 8, and 16, and the critical points of the Morse function have indices 0, n / 2, and n. Zhuzhoma ...
Added: November 16, 2020
Polotovskiy G., Борисов И. М., Итоги науки и техники. Современная математика и ее приложения. Тематические обзоры 2020 Т. 176 С. 3-18
The problem of topological classification of locations in the real projective plane of the union of nonsingular curves of degrees 2 and 6 is considered under some conditions of maximality and general position. After listing the permissible topological models of such locations to be investigated using the Orevkov method, based on the theory of braides ...
Added: October 25, 2019
Kruglov V., Malyshev D., Pochinka O. et al., Discrete and Continuous Dynamical Systems 2020
In this paper, we study gradient-like flows without heteroclinic intersections on n-sphere up to topological conjugacy. We prove that such a flow is completely defined by a bi-colour tree corresponding to a skeleton formed by co-dimension one separatrices. Moreover, we show that such a tree is a complete invariant for these flows with respect to ...
Added: October 17, 2019
Saraev I., Журнал Средневолжского математического общества 2023 Т. 25 № 2 С. 62-75
В статье рассматривается класс G градиентно-подобных потоков на связных замкнутых многообразиях размерности n≥4, такой что для любого потока f^t∈G устойчивые и неустойчивые многообразия седловых состояний равновесия размерности (n−1) не пересекаются с инвариантными многообразиями других седловых состояний равновесия. Известно, что несущее многообразие любого потока f^t из класса G раскладывается в связную сумму сферы S^n, g≥0 копий ...
Added: July 11, 2023
Pochinka O., Митрякова Т. М., Труды Средневолжского математического общества 2015 Т. 17 № 4 С. 37-40
Получены необходимые и достаточные условия топологической сопряженности диффеоморфизмов на три-моногобразиях с конечным числом орбит гетероклинического касания. ...
Added: December 7, 2015
Zhuzhoma E. V., Medvedev V., Sbornik Mathematics 2016 Vol. 207 No. 5 P. 702-723
Continuous Morse-Smale flows on closed manifolds whose nonwandering set consists of three equilibrium positions are considered. Necessary and sufficient conditions for topological equivalence of such flows are obtained and the topological structure of the underlying manifolds is described. Bibliography: 36 titles. © 2016 Russian Academy of Sciences (DoM), London Mathematical Society, Turpion Ltd. ...
Added: September 13, 2016
Grines V., Левченко Ю. А., Доклады Российской академии наук. Математика, информатика, процессы управления (ранее - Доклады Академии Наук. Математика) 2012 Т. 447 № 2 С. 127-129
The paper is devoted to topological classifiication of cascades on 3-manifolds whose nonwandering set consists of surface 2-dimensional basic sets. ...
Added: February 25, 2015
Gurevich E., Pochinka O., Grines V., Современная математика. Фундаментальные направления 2014
В работе изучается класс $G(M^n)$ сохраняющих ориентацию диффеоморфизмов Морса-Смейла на связном замкнутом гладком многообразии $M^n$ размерности $n\geq 4$, выделенный следующими условиями: для любого $f\in G(M^n)$ инвариантные многообразия седловых периодических точек имеют размерность $1$ и $(n-1)$; инвариантные многообразия различных седловых точек не пересекаются. Доказано, что, в зависимости от соотношения между числом седловых и узловых периодических ...
Added: October 24, 2014
Kruglov V., Malyshev D., Pochinka O. et al., Regular and Chaotic Dynamics 2020 Vol. 25 No. 6 P. 716-728
In this paper, we study gradient-like flows without heteroclinic intersections on n-sphere up to topological conjugacy. We prove that such a flow is completely defined by a bi-colour tree corresponding to a skeleton formed by co-dimension one separatrices. Moreover, we show that such a tree is a complete invariant for these
flows with respect to the ...
Added: November 15, 2020
Grines V., Zhuzhoma E. V., Medvedev V. et al., Siberian Advances in Mathematics 2018 Т. 21 № 2 С. 163-180
In this paper, we study the relationship between the structure of the set of equilibrium states of a gradient-like flow and the topology of a carrier manifold of dimension 4 and higher. We introduce a class of manifolds admitting a generalized Heegaard decomposition. It is established that if a non-wandering set of a gradient-like flow ...
Added: May 27, 2018
Grines V., Gurevich E., Medvedev V., Труды Математического института им. В.А. Стеклова РАН 2020 Т. 310 С. 119-134
В работе рассматривается класс G(S^n) сохраняющих ориентацию диффеоморфизмов Морса-Смейла, заданных на сфере S^n размерности n≥4 в предположении, что инвариантные многообразия различных седловых периодических точек не пересекаются. Для диффеоморфизмов из этого класса описан алгоритм реализации всех классов топологической сопряженности. ...
Added: June 4, 2020
Shubin D., Известия высших учебных заведений. Прикладная нелинейная динамика 2021 Т. 21 № 6 С. 863-868
The purpose of this study is to establish the topological properties of three-dimensional manifolds which admit
Morse – Smale flows without fixed points (non-singular or NMS-flows) and give examples of such manifolds that are not lens spaces. Despite the fact that it is known that any such manifold is a union of circular handles, their topology ...
Added: December 1, 2021
Grines V., Zhuzhoma E. V., Medvedev V. et al., Труды Средневолжского математического общества 2016 Т. 18 № 1 С. 12-16
We consider the class of continuous Morse-Smale flows defined on a topological closed manifold $M^n$ of dimension n which is not less than three, and such that the stable and unstable manifolds of saddle equilibrium states do not have intersection. We establish a relationship between the existence of such flows and topology of closed trajectories ...
Added: June 8, 2016
Левченко Ю. А., Grines V., Pochinka O., Математические заметки 2015 Т. 97 № 2 С. 318-320
В статье получена топологическая классификация структурно устойчивых диффеоморфизмов трехмерных многообразий, неблуждающее множество которых состоит из двумерных базисных множеств. ...
Added: September 2, 2015