Dipòsit Digital de Documents de la UAB 110 registres trobats  inicianterior98 - 107següent  anar al registre: La cerca s'ha fet en 0.01 segons. 
98.
15 p, 341.9 KB On the birth of minimal sets for perturbed reversible vector fields / Llibre, Jaume (Universitat Autònoma de Barcelona. Departament de Matemàtiques) ; Martins, Ricardo Miranda (Universidade Estadual de Campina (Brasil). Departamento de Matematica) ; Teixeira, Marco Antonio (Universidade Estadual de Campina (Brasil). Departamento de Matematica)
The results in this paper fit into a program to study the existence of periodic orbits, invariant cylinders and tori filled with periodic orbits in perturbed reversible systems. Here we focus on bifurcations of one-parameter families of periodic orbits for reversible vector fields in R4. [...]
2011 - 10.3934/dcds.2011.31.763
Discrete and continuous dynamical systems. Series A, Vol. 31 Núm. 3 (2011) , p. 763-777  
99.
14 p, 492.6 KB On the limit cycles bifurcating from an ellipse of a quadratic center / Llibre, Jaume (Universitat Autònoma de Barcelona. Departament de Matemàtiques) ; Schlomiuk, Dana (Université de Montréal(Canada). Département de Mathématiques et Statistique)
Consider the class of all quadratic centers whose period annulus has a periodic solution whose phase curve is an ellipse E. The period annulus of any of such quadratic centers has cyclicity at least one, and this one is due to a family of algebraic limit cycles(formed by ellipses) bifurcating from the ellipse E. [...]
2015 - 10.3934/dcds.2015.35.1091
Discrete and continuous dynamical systems. Series A, Vol. 35 Núm. 3 (2015) , p. 1091-1102  
100.
33 p, 1.1 MB Bifurcation values for a familiy of planar vector fields of degree five / García Saldaña, Johanna Denise (Universitat Autònoma de Barcelona. Departament de Matemàtiques) ; Gasull i Embid, Armengol (Universitat Autònoma de Barcelona. Departament de Matemàtiques) ; Giacomini, Hector (Université de Tours (France). Laboratoire de Mathématiques et Physique Théorique)
We study the number of limit cycles and the bifurcation diagram in the Poincar' sphere of a one-parameter family of planar differential equations of degree e ˙ five x = Xb (x) which has been already considered in previous papers. [...]
2015 - 10.3934/dcds.2015.35.669
Discrete and continuous dynamical systems. Series A, Vol. 35 Núm. 2 (2015) , p. 669-701  
101.
27 p, 522.8 KB Topological and algebraic reducibility for patterns on trees / Alsedà i Soler, Lluís (Universitat Autònoma de Barcelona. Departament de Matemàtiques) ; Juher, David (Universitat de Girona. Departament d'Informàtica i Matemàtica Aplicada) ; Mañosas Capellades, Francesc (Universitat Autònoma de Barcelona. Departament de Matemàtiques)
We extend the classical notion of block structure for periodic orbits of interval maps to the setting of tree maps and study the algebraic properties of the Markov matrix of a periodic tree pattern having a block structure. [...]
2015 - 10.1017/etds.2013.52
Ergodic Theory and Dynamical Systems, Vol. 35 (2015) , p. 34-63  
102.
6 p, 729.4 KB Limit cycles of a class of generalized Liénard polynomial equations / Llibre, Jaume (Universitat Autònoma de Barcelona. Departament de Matemàtiques) ; Makhlouf, Ammar (University of Annaba (Algeria). Department of Mathematics)
We prove that the generalized Liénard polynomial differential system x'=y^2p-1, y'=-x^2q-1 - f(x) y^2n-1, where p, q, and n are positive integers; is a small parameter; and f(x) is a polynomial of degree m which can have [m/2] limit cycles, where [x] is the integer part function of x.
2015 - 10.1007/s10883-014-9253-4
Journal of Dynamical and Control Systems, Vol. 21 (2015) , p. 189-192  
103.
18 p, 697.9 KB Center conditions for a class of planar rigid polynomial differential systems / Llibre, Jaume (Universitat Autònoma de Barcelona. Departament de Matemàtiques) ; Rabanal, Roland (Pontificia Universidad Católica del Perú. Departamento de Ciencias)
In general the center-focus problem cannot be solved, but in the case that the singularity has purely imaginary eigenvalues there are algorithms to solving it. The present paper implements one of these algorithms for the polynomial differential systems of the form x = −y + xf (x)g(y), y = x + yf (x)g(y), where f (x) and g(y) are arbitrary polynomials. [...]
2015 - 10.3934/dcds.2015.35.1075
Discrete and continuous dynamical systems. Series A, Vol. 35 Núm. 3 (2015) , p. 1075-1090  
104.
13 p, 309.0 KB A survey on the set of periods of the graph homeomorphisms / Gouveia, Marcio R. A. (Universitat Autònoma de Barcelona. Departament de Matemàtiques) ; Llibre, Jaume (Universitat Autònoma de Barcelona. Departament de Matemàtiques)
In this paper we summarize the known results on the possible sets of periods of homeomorphisms defined on some classes of finite connected compact graphs, and we present new results.
2015 - 10.1007/s12346-015-0132-5
Qualitative Theory of Dynamical Systems, Vol. 14 (2015) , p. 39-50  
105.
20 p, 413.0 KB Stability of singular limit cycles for Abel equations / Bravo, Jose Luis (Universidad de Extremadura. Departamento de Matemáticas) ; Gasull i Embid, Armengol (Universitat Autònoma de Barcelona. Departament de Matemàtiquess) ; Fernández, Manuel (Universidad de Extremadura. Departamento de Matemáticas)
We obtain a criterion for determining the stability of singular limit cycles of Abel equations x = A(t)x3 + B(t)x2 . This stability controls the possible saddle-node bifurcations of limit cycles. Therefore, studying the Hopf-like bifurcations at x = 0, together with the bifurcations at infinity of a suitable compactification of the equations, we obtain upper bounds of their number of limit cycles. [...]
2015 - 10.3934/dcds.2015.35.1873
Discrete and continuous dynamical systems. Series A, Vol. 35 Núm. 5 (2015) , p. 1873-1890  
106.
45 p, 678.8 KB On the set of periods of sigma maps of degree 1 / Alsedà i Soler, Lluís (Universitat Autònoma de Barcelona. Departament de Matemàtiques) ; Ruette, Sylvie (Université Paris-Sud 11. Laboratoire de Mathématiques)
We study the set of periods of degree 1 continuous maps from σ into itself, where σ denotes the space shaped like the letter σ (i. e. , a segment attached to a circle by one of its endpoints). Since the maps under consideration have degree 1, the rotation theory can be used. [...]
2015 - 10.3934/dcds.2015.35.4683
Discrete and continuous dynamical systems. Series A, Vol. 35 Núm. 10 (2015) , p. 4683-4734  
107.
14 p, 328.8 KB Semiconjugacy to a map of a constant slope / Alsedà i Soler, Lluís (Universitat Autònoma de Barcelona. Departament de Matemàtiques) ; Misiurewicz, Michal (IUPUI (Indianapolis). Department of Mathematical Sciences)
It is well known that a continuous piecewise monotone interval map with positive topological entropy is semiconjugate to a map of a constant slope and the same entropy, and if it is additionally transitive then this semiconjugacy is actually a conjugacy. [...]
2015 - 10.3934/dcdsb.2015.20.3403
Discrete and Continuous Dynamical Systems. Series B, Vol. 20 Núm. 10 (2015) , p. 2043-2413  

Dipòsit Digital de Documents de la UAB : 110 registres trobats   inicianterior98 - 107següent  anar al registre:
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