Final Evolutions for Lotka-Volterra Systems in R3 Having a Darboux Invariant
Llibre, Jaume 
(Universitat Autònoma de Barcelona. Departament de Matemàtiques)
Zhao, Yulin 
(Sun Yat-sen University. School of Mathematics)
| Date: |
2025 |
| Abstract: |
The Lotka-Volterra systems have been studied intensively due to their applications. While the phase portraits of the 2-dimensional Lotka-Volterra systems have been classified, this is not the case for the ones in dimension three. Here we classify all the 3-dimensional Lotka-Volterra systems having a Darboux invariant of the form x1y2z3e, where λ, s ∈ R and s(λ123) ≠ 0. The existence of such kind of Darboux invariants in a differential system allow to determine the α-limits and ω-limits of all the orbits of the differential system. For this class of Lotka-Volterra systems we can describe completely their phase portraits in the Poincaré ball. As an application we illustrate with an example one of these phase portraits. |
| Grants: |
Agencia Estatal de Investigación PID2022-136613NB-I00 Agència de Gestió d'Ajuts Universitaris i de Recerca 2021/SGR-00113
|
| Note: |
Altres ajuts: Reial Acadèmia de Ciències i Arts de Barcelona |
| Rights: |
Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.  |
| Language: |
Anglès |
| Document: |
Article ; recerca ; Versió publicada |
| Subject: |
Lotka-Volterra systems ;
Darboux invariants ;
Global dynamics ;
Poincare compactification |
| Published in: |
Electronic journal of differential equations, Vol. 2025, Núm. 37 (2025) , p. 1-16, ISSN 1072-6691 |
DOI: 10.58997/ejde.2025.37
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Record created 2025-06-11, last modified 2025-07-06