2 papers
math.DS2025
The dynamics of the Ehrhard-Müller system with invariant algebraic surfaces
Jaume Llibre, Gabriel Rondón
In this paper we study the global dynamics of the Ehrhard-Müller differential system \[ \dot{x} = s(y - x), \quad \dot{y} = rx - xz - y + c, \quad \dot{z} = xy - z, \] where ,…
math.DS2025
Phase portraits of a family of Kolmogorov systems depending on six parameters
Ãrika Diz-Pita, Jaume Llibre, M. Victoria Otero-Espinar
Consider a general -dimensional Lotka-Volterra system with a rational first integral of degree two of the form . The restriction of this Lotka-Volterra system to…