Normal forms for Hopf-Zero singularities with nonconservative nonlinear part

Details Normal forms for Hopf-Zero singularities with nonconservative nonlinear part Normal forms for Hopf-Zero singularities with nonconservative nonlinear part

2011-12-12

arxiv.org/abs/1112.2544v2

Mathematics

Dynamical Systems

Scientific paper

In this paper we are concerned with the simplest normal form computation of a family of Hopf-zero vector fields without a first integral. This family of vector fields are the classical normal forms of a larger family of vector fields with Hopf-Zero singularity. Indeed, (E) is defined such that this family would be a Lie subalgebra for the space of all classical normal form vector fields with Hopf-Zero singularity. The simplest normal forms and simplest orbital normal forms of this family of vector fields with non-zero quadratic part are computed. We also obtain the simplest parametric normal form of any non-degenerate perturbation of this family within the Lie subalgebra. The symmetry group of the simplest normal forms are also discussed. This is a part of our results in decomposing the normal forms of Hopf-Zero singular vector fields into vector fields with a first integral and nonconservative vector fields.

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