Resultats globals: 2 registres trobats en 0.01 segons.
Articles, 2 registres trobats
Articles 2 registres trobats  
1.
20 p, 399.5 KB Alien limit cycles in Liénard equations / Coll, Bartomeu (Universitat de les Illes Balears. Departament de Ciències Matemàtiques i Informàtica) ; Dumortier, Freddy (Universiteit Hasselt(Belgium). Dept. Wiskunde) ; Prohens, Rafel (Universitat de les Illes Balears. Departament de Ciències Matemàtiques i Informàtica)
This paper aims at providing an example of a family of polynomial Liénard equations exhibiting an alien limit cycle. This limit cycle is perturbed from a 2-saddle cycle in the boundary of an annulus of periodic orbits given by a Hamiltonian vector field. [...]
2013 - 10.1016/j.jde.2012.11.005
Journal of differential equations, Vol. 254 (2013) , p. 1582-1600  
2.
33 p, 1.2 MB Codimension 4 singularities of reflectionally symmetryc planar vector fields / Dumortier, Freddy ; Ibáñez, S.
The paper deals with the topological classification of singularities of vector fields on the plane which are invariant under reflection with respect to a line. As it has been proved in previous papers, such a classification is necessary to determine the different topological types of singularities of vector fields on R3 whose linear part is invariant under rotations. [...]
1999 - 10.5565/PUBLMAT_43299_04
Publicacions matemàtiques, V. 43 N. 2 (1999) , p. 501-533  

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2 Dumortier, Freddy
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