Abstract
The goal of this work is to apply topological methods to obtain results about continuous flows determined by differential equations. Specifically, we apply the Conley Index Theory to prove that, under certain assumptions, there is an invariant set which contains a non-trivial solution. The construction of this invariant set is purely topological and depends on the flow of the differential equation, but the existence of the non trivial solution is obtained as an application of homological techniques. In this survey paper we develop and precise these ideas, and in order to get a better understanding we include some examples and computations in some ordinary differential equations. This work is mostly based on [6].
References
A.V. Bolsinov, A.V. Borisov, I.S. Mamaev, Bifurcation analysis and the Conley index in mechanics, Regular and Chaotic Dynamics 17(2012), no. 5, 451–478. Doi: 10.1134/S1560354712050073
A. Hatcher, Algebraic Topology, Cornell University and Cambridge University Press, 2002. https://pi.math.cornell.edu/ hatcher/AT/AT.pdf
M.W. Hirsch, R.L. Devaney, S. Smale, Differential Equations, Dynamical Systems, and Linear Algebra, Pure and Applied Mathematics Series, Academic Press, San Diego, 1974.
T. Kaczynski, K. Mischaikow, M. Mrozek, Computational Homology, Applied Mathematical Sciences, Springer, New York NY, 2004. Doi: 10.1007/b97315
W.S. Massey, A Basic Course in Algebraic Topology, Graduate Texts in Mathematics, Springer, New York NY, 1977.
K. Mischaikow, M. Mrozek, Conley index, in: B. Fiedler (Ed.) Handbook of Dynamical Systems, Vol. 2, Elsevier Science, 2002, pp. 393–460. Doi: 10.1016/S1874-575X(02)80030-3
L. Perko, Differential Equations and Dynamical Systems, Texts in Applied Mathematics, Springer, New York NY, 2008. Doi: 10.1007/978-1-4613-0003-8
Comments
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
Copyright (c) 2021 Revista de Matemática: Teoría y Aplicaciones