Conferències i seminaris | Congressos | Grups de recerca | Publicacions | Persones Persones
Zhifen Zhang (Xina)
Publicacions
A uniform proof on the weak Hilbert’s 16th problem for n=2, 2003
CHEN, F.; LI, Ch.; LLIBRE, J. & ZHANG, Zh. *A uniform proof on the weak Hilbert’s 16th problem for n=2*. Publicacions del CRM, núm. 526 (2003)
Abelian integrals of quadratic Hamiltonian vector fields with an invariant straght line, 1993
LI, C.; LLIBRE, J. & ZHANG, Z. *Abelian integrals of quadratic Hamiltonian vector fields with an invariant straght line*. Publicacions del CRM, núm. 234 (1993)
Bifurcation of limits cycles from quadratic isochronous centers, 1999
LI, C.; LI, W.; LLIBRE, J. & ZHANG, Z. *Bifurcation of limits cycles from quadratic isochronous centers*. Publicacions del CRM, núm. 413 (1999)
Chebyshev property of complete elliptic integrals and its application to abelian integrals, 1999
GASULL, A.; LI, W.; LLIBRE, J. & ZHANG, Z. *Chebyshev property of complete elliptic integrals and its application to abelian integrals*. Publicacions del CRM, núm. 423 (1999)
Linear estimation of the number of zeros of Abelian Integrals for some cubic isochronous centers, 1999
LI, C.; LI, W.; LLIBRE, J. & ZHANG, Z. *Linear estimation of the number of zeros of Abelian Integrals for some cubic isochronous centers*. Publicacions del CRM, núm. 412 (1999)
New families of centres and limit cycles for polynomial differential systems with homogeneous nonlinearities, 2003
LI, Ch.; LI, W.; LLIBRE, J. & ZHANG, Zh. *New families of centres and limit cycles for polynomial differential systems with homogeneous nonlinearities*. Publicacions del CRM, núm. 528 (2003)
On the uniqueness of limit cycle of generalized Liénard equation, 1992
ZHANG, Z.; XIANWU, Z. & SUZHI, G. *On the uniqueness of limit cycle of generalized Liénard equation*. Publicacions del CRM, núm. 152 (1992)
Polynomial systems: a lower bound for the weakened 16th Hilbert problem, 1999
LI, C.; LI, W.; LLIBRE, J. & ZHANG, Z. *Polynomial systems: a lower bound for the weakened 16th Hilbert problem*. Publicacions del CRM, núm. 411 (1999)
Weak focus, limit cycles and bifurcations for bounded quadratic systems, 1992
LI, C.; LLIBRE, J. & ZHANG, Z. *Weak focus, limit cycles and bifurcations for bounded quadratic systems*. Publicacions del CRM, núm. 161 (1992)
Altres activitats (conferències, seminaris)
Investigador visitant - Peking Univ. Beijing - Sistemes dinàmics [4/3/1992 - 30/6/1992]
Unfolding of the Critical Homoclinic Orbit of a class of Degenerate Equilibrium Points (18/3/1992)
Investigador visitant - Peking Univ. Beijing - Sistemes dinàmics [4/3/1992 - 30/6/1992]
On the uniqueness of limit cycle of generalized Liènard equation (13/5/1992)
Ponent de congrés - Peking Univ. Beijing - [15/9/1998 - 15/12/1998]
Different methods for estimating the number of zeros of Abelian integrals (15/9/1998)
Dins el Semestre de Sistemes Dinàmics, 15 setembre a 15 desembre 1998. No en consta la data exacta