On the number of invariant conics for the polynomial vector fields defined on quadrics
Bolaños Rivera, Yudy Marcela (Universitat Autònoma de Barcelona. Departament de Matemàtiques)
Llibre, Jaume ![Identificador ORCID](/img/uab/orcid.ico)
(Universitat Autònoma de Barcelona. Departament de Matemàtiques)
Valls, Clàudia 1973-
![Identificador ORCID](/img/uab/orcid.ico)
(Universidade Técnica de Lisboa. Departamento de Matemática)
Fecha: |
2013 |
Resumen: |
The quadrics here considered are the nine real quadrics: parabolic cylinder, elliptic cylinder, hyperbolic cylinder, cone, hyperboloid of one sheet, hyperbolic paraboloid, elliptic paraboloid, ellipsoid and hyperboloid of two sheets. Let Q be one of these quadrics. We consider a polynomial vector field X = (P, Q, R) in R3 whose flow leaves Q invariant. If m1 = degree P, m2 = degree Q and m3 = degree R, we say that m = (m1, m2, m3) is the degree of X. In function of these degrees we find a bound for the maximum number of invariant conics of X that result from the intersection of invariant planes of X with Q. The conics obtained can be degenerate or not. Since the first six quadrics mentioned are ruled surfaces, the degenerate conics obtained are formed by a point, a double straight line, two parallel straight lines, or two intersecting straight lines; thus for the vector fields defined on these quadrics we get a bound for the maximum number of invariant straight lines contained in invariant planes of X. In the same way, if the conic is non degenerate, it can be a parabola, an ellipse or a hyperbola and we provide a bound for the maximum number of invariant non degenerate conics of the vector field X depending on each quadric Q and of the degrees m1, m2 and m3 of X. |
Ayudas: |
Ministerio de Ciencia e Innovación MTM2008-03437 Agència de Gestió d'Ajuts Universitaris i de Recerca 2014/SGR-410
|
Nota: |
Agraïments: The third author is supported by the grants AGAUR PIV-DGR-2010 and by FCT through CAMGD |
Derechos: |
Tots els drets reservats. ![](/img/licenses/InC.ico) |
Lengua: |
Anglès |
Documento: |
Article ; recerca ; Versió acceptada per publicar |
Materia: |
Polynomial vector fields ;
Invariant quadrics ;
Invariant conics ;
Extactic polynomial |
Publicado en: |
Bulletin des Sciences Mathematiques, Vol. 137 (2013) , p. 746-774, ISSN 0007-4497 |
DOI: 10.1016/j.bulsci.2013.04.003
El registro aparece en las colecciones:
Documentos de investigación >
Documentos de los grupos de investigación de la UAB >
Centros y grupos de investigación (producción científica) >
Ciencias >
GSD (Grupo de sistemas dinámicos)Artículos >
Artículos de investigaciónArtículos >
Artículos publicados
Registro creado el 2016-05-06, última modificación el 2022-02-13