Results 251 to 260 of about 275,056 (272)

Nonexistence of limit cycles for a class of structurally stable quadratic vector fields

Discrete and Continuous Dynamical Systems, 2007
Jaume Llibre
exaly  

Structurally Unstable Quadratic Vector Fields of Codimension Two: Families Possessing Either a Cusp Point or Two Finite Saddle-Nodes

Journal of Dynamics and Differential Equations, 2020
Joan C Artes, Joan Artés, Alex C Rezende   +2 more
exaly  

Perturbations of the non-generic quadratic Hamiltonian vector fields with hyperbolic segment

Bulletin Des Sciences Mathematiques, 2001
Yulin Zhao
exaly  

Liouvillian and analytic integrability of the quadratic vector fields having an invariant ellipse

Acta Mathematica Sinica, English Series, 2014
Jaume Llibre, Claudia Valls
exaly  

Phase portraits of quadratic polynomial vector fields having a rational first integral of degree 2

Nonlinear Analysis: Theory, Methods & Applications, 2007
Jaume Llibre
exaly  

Structurally Unstable Quadratic Vector Fields of Codimension One

2018
Joan C. Artés, Jaume Llibre, Alex C. Rezende   +2 more
openaire   +1 more source

Normal forms and global phase portraits of quadratic and cubic integrable vector fields having two nonconcentric circles as invariant algebraic curves

Dynamical Systems, 2017
Jaume Llibre, Marcelo Messias, Alisson C Reinol   +2 more
exaly  

Phase portraits of quadratic polynomial vector fields having a rational first integral of degree 3

Nonlinear Analysis: Theory, Methods & Applications, 2009
Jaume Llibre, Regilene D S Oliveira
exaly  

Interval regression analysis using quadratic loss support vector machine

IEEE Transactions on Fuzzy Systems, 2005
Dug Hun Hong
exaly  

The sovability of norm, bilinear and quadratic equations over finite fields via spectra of graphs

Forum Mathematicum, 2014
Le Anh Vinh
exaly