[HTML][HTML] Analytically integrable system orbitally equivalent to a semi-quasihomogeneous system

A Algaba, C García, M Reyes, J Giné - Nonlinear Analysis, 2023 - Elsevier
For perturbations of integrable non-Hamiltonian quasi-homogeneous planar vector field
whose origin is a non-degenerate singular point, orbital linearization and analytic …

Analytical integrability of perturbations of quadratic systems

A Algaba, C García, M Reyes - Mediterranean Journal of Mathematics, 2021 - Springer
Analytical Integrability of Perturbations of Quadratic Systems | Mediterranean Journal of
Mathematics Skip to main content SpringerLink Account Menu Find a journal Publish with us …

Periodic orbits bifurcating from a Hopf equilibrium of 2-dimensional polynomial Kolmogorov systems of arbitrary degree

D Djedid, J Llibre, A Makhlouf - Chaos, Solitons & Fractals, 2021 - Elsevier
A Hopf equilibrium of a differential system in R 2 is an equilibrium point whose linear part
has eigenvalues±ω i with ω≠ 0, where i=− 1. We provide necessary and sufficient …

[PDF][PDF] Analytical integrability of perturbations of degenerate quadratic systems

A Algaba, C García, M Reyes, J Giné - Journal of Applied Analysis …, 2024 - jaac-online.com
We consider analytic perturbations of quadratic homogeneous differential systems having
an isolated singularity at the origin. Here we characterize the analytically integrable …

Analytically Integrable Centers of Perturbations of Cubic Homogeneous Systems

A Algaba, C García, M Reyes - Qualitative Theory of Dynamical Systems, 2021 - Springer
We consider the analytically integrable perturbations of cubic homogeneous differential
systems whose origin is an isolated singularity. We prove that are orbitally equivalent to the …

[HTML][HTML] Quasi-homogeneous linearization of degenerate vector fields

A Algaba, C García, M Reyes - Journal of Mathematical Analysis and …, 2020 - Elsevier
We characterize the analytic planar vector fields orbitally equivalent to its quasi-
homogeneous leader term, by means the existence of a class of inverse integrating factors …

Analytic partial-integrability of a symmetric Hopf-zero degeneracy

A Algaba, C García, M Reyes - Proceedings of the Royal Society of …, 2023 - cambridge.org
We deal with analytic three-dimensional symmetric systems whose origin is a Hopf-zero
singularity. Once it is not completely analytically integrable, we provide criteria on the …

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B MOKHTAR-ANNABA - 2019 - biblio.univ-annaba.dz
Le présent travail, tente de mettre en évidence la composition et la structure de l'avifaune
nicheuse des aulnaies en Algérie plus particulièrement celle d'El Kala et l'effet du …