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On Embedding of Separatrices of Morse-Smale Diffeomorphism on Manifolds of Dimension n ≥ 4
Russian Journal of Nonlinear Dynamics. 2026. Vol. 22. No. 2. P. 469–483.
We show that, for Morse – Smale diffemorphism f: M^n→M^n, n⩾4, the closure of one- and (n−1)-dimensional separatrices in a basin of a sink point ω forms a trivial frame that contrasts with the case n=3. This result is a first step in the solution of problems of topological classification, embedding in a flow and existence of energy functions for such diffeomorphisms.
Gurevich E., Saraev I., Известия РАН. Серия математическая 2026 Т. 90 № 3 С. 19–57
In this paper, we consider a class of gradient-like ows without heteroclinic
intersections, dened on closed manifolds of dimension four. We show that for
such ows, the problem of complete topological classication can be reduced to
the combinatorial problem of distinguishing special framed graphs describing
the mutual arrangement of invariant manifolds and the action of the ow on a
wandering ...
Added: May 18, 2026
Galkin V., Pochinka O., Успехи математических наук 2026 Т. 81 № 2(422) С. 71–144
Настоящая работа посвящена изучению динамики регулярных четырехмерных потоков, их топологической классификации и взаимосвязи с топологией несущего многообразия. Регулярные потоки являются топологическими аналогами потоков Морса–Смейла. Их появление мотивировано двумя фактами: 1) существованием топологических многообразий размерности 4 и выше, не имеющих гладкой структуры; 2) развитием методов топологической классификации гладких систем, использующих чисто топологические свойства этих систем и ...
Added: April 1, 2026
Мартынов Т. Д., Pochinka O., Chilina E., Математика и теоретические компьютерные науки 2025 Т. 3 № 3 С. 87–109
According to J. Nielsen and H. Hang, each class of topological conjugacy of periodic homeomorphisms of orientable compact surfaces is completely described by a finite set of data called the characteristic. For a two-dimensional sphere, exhaustive classification results with the construction of linear representatives in each conjugacy class were obtained by B. Kerekyarto. For a ...
Added: October 18, 2025
Gurevich E., Математика и теоретические компьютерные науки 2025 Т. 3 № 3 С. 20–42
A topological classification of smooth, structurally stable flows on four-dimensional closed manifolds is obtained, the wandering set of which contains isolated trajectories connecting saddle equilibria (heteroclinic curves). For dimensional reasons, the heteroclinic curves of such flows belong to the intersection of invariant manifolds of saddles of adjacent Morse indices. We assume that the non-wandering set of ...
Added: October 18, 2025
Gurevich E., Saraev I., Communications in Nonlinear Science and Numerical Simulation 2026 Vol. 152 No. D Article 109301
We consider homeomorphisms with a finite and topologically hyperbolic chain-recurrent set and explore the interrelation between the structure of the chain-recurrent set and the topology of carrying manifolds of dimension n > 3. We demonstrate that the Lefschetz fixed-point theorem can be refined for this class of homeomorphisms as follows: if the (n-1)-dimensional invariant manifold ...
Added: October 4, 2025
Galkin V., Pochinka O., Математические заметки 2025 Т. 117 № 6 С. 861–878
Под регулярным топологическим потоком на замкнутом nn-многообразии понимается поток, цепно рекуррентное множество которого состоит из конечного числа топологически гиперболических неподвижных точек и периодических орбит. Такой поток называется неособым, если его цепно рекуррентное множество не содержит неподвижных точек. Топологической эквивалентности маломерных неособых потоков в предположениях различной общности посвящен целый ряд работ. Начиная с размерности 4 имеется пока незначительное число ...
Added: June 2, 2025
Elena Ya. Gurevich, Ilya A. Saraev, Regular and Chaotic Dynamics 2025 Vol. 30 No. 2 P. 254–278
S.~Smale has shown that any closed smooth manifold admits a gradient-like flow, which is a structurally stable flow with a finite non-wandering set. Polar flows are a specific type of gradient-like flows characterized by the simplest non-wandering set for the given manifold, consisting of exactly one source, one sink, and a finite number of saddle ...
Added: November 21, 2024
E.Y. Gurevich, I.A. Saraev, Partial Differential Equations in Applied Mathematics 2024 Vol. 11 Article 100759
We study relations between a structure of non-wandering set of a Morse–Smale diffeomorphism f and its carrying closed manifold M^n. We prove that if f has no any saddle periodic points with one-dimensional unstable manifolds, and for any periodic point p of Morse index (n−1) its unstable manifolds do not intersect stable invariant manifolds of saddle periodic points different from ...
Added: June 22, 2024
Shubin D., Pochinka O., / Series math "arxiv.org". 2024.
In this paper we consider 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 orbit and it is twisted. It is found that any manifold admitting such flows is either a lens space, or a connected sum of a lens space ...
Added: May 14, 2024
Morozov A., Pochinka O., Moscow Mathematical Journal 2023 Vol. 23 No. 4 P. 571–590
In this paper, we consider orientation-preserving Morse-Smale diffeomorphisms on orientable closed surfaces. Such diffeomorphisms can have infinitely many heteroclinic orbits, which makes their topological classification very difficult. In fact, even in the case of a finite number of heteroclinic orbits, there are no exhaustive classification results. The main problem is that for all currently known ...
Added: November 29, 2023
Kruglov V., Рекшинский М. С., Журнал Средневолжского математического общества 2023 Т. 25 № 3 С. 123–149
This paper is devoted to gradient-like flows on surfaces, which are Morse-Smale
flows without limit cycles, and to their topological classification up to topological conjugacy.
Such flows, otherwise called Morse flows, have been repeatedly classified by means of various
topological invariants. One of these invariants is the two-colour Wang’s graph, which is
valid only for gradient-like flows on orientable ...
Added: September 26, 2023
Grines V., Mints D., Regular and Chaotic Dynamics 2023 Vol. 28 No. 3 P. 295–308
—In P. D. McSwiggen’s article, it was proposed Derived from Anosov type construction which leads to a partially hyperbolic diffeomorphism of the 3-torus. The nonwandering set of this diffeomorphism contains a two-dimensional attractor which consists of one-dimensional unstable manifolds of its points. The constructed diffeomorphism admits an invariant onedimensional orientable foliation such that it contains ...
Added: August 2, 2023
Grines V., Mints D., Mathematical notes 2023 Vol. 113 No. 4 P. 613–617
Added: August 2, 2023
Горская В. А., Чебышевский сборник 2022 Т. 23 № 3 С. 61–76
The problem of topological classification of real algebraic curves is a classical problem in fundamental mathematics that actually arose at the origins of mathematics. The problem gained particular fame and modern formulation after D. Hilbert included it in his famous list of mathematical problems at number 16 in 1900. This was the problem of classifying ...
Added: May 13, 2023
A. L. Dobrolyubova, V. E. Kruglov, O. V. Pochinka, Journal of Mathematical Sciences 2023 Vol. 269 No. 2 P. 165–172
The simplest nonsingular flows on closed orientable 3-manifolds are studied. We establish
that each class of topological equivalence of the simplest nonsingular flow on a
lens consists of an infinite set of topological conjugacy classes. We obtain necessary
and sufficient conditions for the topological conjugacy of the flows under consideration. ...
Added: February 18, 2023
V. Z. Grines, E. Ya. Gurevich, O. V. Pochinka, Journal of Mathematical Sciences 2022 Vol. 265 No. 6 P. 868–887
This review presents the results of recent years on solving of the Palis problem on finding necessary and sufficient conditions for the embedding of Morse–Smale cascades in topological flows. To date, the problem has been solved by Palis for Morse–Smale diffeomorphisms given on manifolds of dimension two. The result for the circle is a trivial ...
Added: February 2, 2023
Pochinka O., Shubin D., / 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., 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
E. V. Zhuzhoma, V. S. Medvedev, Mathematical notes 2022 Vol. 111 No. 5-6 P. 870–878
We introduce high-dimensional Morse-Smale systems with king-saddles. Every saddle of such system has a separatrix with heteroclinic intersections. We get the necessary and sufficient conditions of conjugacy of Morse-Smale diffeomorphisms with king-saddles. For every polar Morse-Smale system with two saddles on the $n$-sphere $\mathbb{S}^n$, one proves the existence of a king-saddle. This allows to get ...
Added: October 30, 2022
Grines V., Gurevich E., Yakovlev E., Журнал Средневолжского математического общества 2021 Т. 23 № 4 С. 379–393
We consider a class GSD(M3) of gradient-like diffeomorphisms with surface dynamics
given on closed oriented manifold M3 of dimension three. In [3] it was proved that manifods,
admitting such diffemorohpsims, are mapping tori under oriented surface of genus g, and the number
of heteroclinic curves no less that 12g. In this paper we determine a subset of GSD(M3) ...
Added: October 24, 2022
Grines V., Mints D., Доклады Российской академии наук. Математика, информатика, процессы управления (ранее - Доклады Академии Наук. Математика) 2022 Т. 505 С. 66–70
We consider regular Denjoy type homeomorphisms of the two-dimensional torus which are the most natural generalization of Denjoy homeomorphisms of the circle. In particular, they arise as Poincaré maps induced on global cross sections by leaves of one-dimensional orientable unstable foliations of some partially hyperbolic diffeomorphisms of closed three-dimensional manifolds. The nonwandering set of each ...
Added: October 21, 2022
Г.М. Полотовский, В кн.: Математика и проблемы образования:Материалы 41-го Международного научного семинара преподавателей математики и информатики университетов и педагогических вузов.: Изд-во ВятГУ, 2022. Гл. 2 С. 54–57.
We consider the problem of isotopic classification of plane real algebraic
curves that decompose into several irreducible factors, which is related to the first part of Hilbert's
16th problem. A review of the results obtained in the last three years about curves of
degree 7 that decompose into three factors, and about curves of degree 8, that decompose ...
Added: September 28, 2022
Pochinka O., Таланова Е. А., Shubin D., / Series arXiv "math". 2022.
Lens spaces are the only 3-manifolds that admit gradient-like flows with four fixed points. This is an immediate corollary of Morse inequality and of the Morse function with four critical points existence. A similar question for gradient-like diffeomorphisms is open. Solution can be approached by describing a complete topological conjugacy invariant of the class of ...
Added: September 13, 2022