title: Review of the research on the qualitative theory of differential equations at St.Petersburg University. I. Stable periodic points of diffeomorphisms with homoclinic points, systems with weakly hyperbolic invariant sets
metadata.name: dc.contributor.author
metadata.value: Begun, Nikita A.
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Vasil’eva, Ekaterina V.
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Zvyagintseva, Tatiana E.
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Iljin, Yurii A.
metadata.lang: -
metadata.name: dc.date.accessioned
metadata.value: 2024-07-04T11:26:02Z
metadata.lang: -
metadata.name: dc.date.available
metadata.value: 2024-07-04T11:26:02Z
metadata.lang: -
metadata.name: dc.date.issued
metadata.value: 2024-06
metadata.lang: -
metadata.name: dc.identifier.citation
metadata.value: Begun N.A., Vasil’eva E.V., Zvyagintseva T. E., Iljin Yu.A. Review of the research on the qualitative theory of differential equations at St.Petersburg University. I. Stable periodic points of diffeomorphisms with homoclinic points, systems with weakly hyperbolic invariant sets. Vestnik of Saint Petersburg University. Mathematics. Mechanics. Astronomy, 2024, vol. 11 (69), issue 2, pp. 211–227. https://doi.org/10.21638/spbu01.2024.201 (In Russian)
metadata.lang: en_GB
metadata.name: dc.identifier.other
metadata.value: https://doi.org/10.21638/spbu01.2024.201
metadata.lang: -
metadata.name: dc.identifier.uri
metadata.value: http://hdl.handle.net/11701/45691
metadata.lang: -
metadata.name: dc.description.abstract
metadata.value: This paper is the first in a series of review publications devoted to the results of scientific research work that has been carried out at the Department of Differential Equations of St. Petersburg University over the past 30 years. Current scientific interests of the department staff can be divided into the following directions and topics: study of stable periodic points of diffeomorphisms with homoclinic points, study of systems with weakly hyperbolic invariant sets, local qualitative theory of essentially nonlinear systems, classification of phase portraits of a family of cubic systems, stability conditions for systems with hysteretic nonlinearities and systems with nonlinearities under the generalized Routh- Hurwitz conditions (Aizerman problem). This paper presents recent results on the first two topics outlined above. The study of stable periodic points of diffeomorphisms with homoclinic points was carried out under the assumption that the stable and unstable manifolds of the hyperbolic points are tangent at a homoclinic (heteroclinic) point, and the homoclinic (heteroclinic) point is not a point with a finite order of tangency. The research of systems with weakly hyperbolic invariant sets was conducted for the case when neutral, stable, and unstable linear spaces do not satisfy the Lipschitz condition.
metadata.lang: en_GB
metadata.name: dc.language.iso
metadata.value: ru
metadata.lang: en_GB
metadata.name: dc.publisher
metadata.value: St Petersburg State University
metadata.lang: en_GB
metadata.name: dc.relation.ispartofseries
metadata.value: Vestnik of St Petersburg University. Mathematics. Mechanics. Astronomy;Volume 11 (69); Issue 2
metadata.lang: -
metadata.name: dc.subject
metadata.value: qualitative theory of differential equations
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: non-transversal homoclinic point and trajectory
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: heteroclinic contour
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: stability
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: hyperbolicity
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: attractor
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: weakly hyperbolic invariant set
metadata.lang: en_GB
metadata.name: dc.title
metadata.value: Review of the research on the qualitative theory of differential equations at St.Petersburg University. I. Stable periodic points of diffeomorphisms with homoclinic points, systems with weakly hyperbolic invariant sets
metadata.lang: en_GB
metadata.name: dc.type
metadata.value: Article
metadata.lang: en_GB
resources.filename: 211-227.pdf
resources.url: https://dspace.spbu.ru/bitstream/11701/45691/1/211-227.pdf
resources.format: Adobe PDF
resources.size: 475,12 kB