Volume 41, Issue 1 (1997)

Articles

J. Chavarriga, J. Llibre
Preface
pp. 5 - 6 [ Article ] 
DOI: 10.5565/PUBLMAT_41197_01

J. C. Artés, J. Llibre
Quadratic vector fields with a weak focus of third order
pp. 7 - 39 [ Abstract ] [ Article ] 
DOI: 10.5565/PUBLMAT_41197_02

J. Chavarriga, H. Giacomini, J. Giné
The null divergence factor
pp. 41 - 56 [ Abstract ] [ Article ] 
DOI: 10.5565/PUBLMAT_41197_03

C. Chicone
Invariant tori for periodically perturbed oscillators
pp. 57 - 83 [ Abstract ] [ Article ] 
DOI: 10.5565/PUBLMAT_41197_04

A. Cima, A. Gasull, F. Mañosas
A polynomial class of Markus-Yamabe counterexamples
pp. 85 - 100 [ Abstract ] [ Article ] 
DOI: 10.5565/PUBLMAT_41197_05

A. Delshams, A. Mir
Psi-series of quadratic vector fields on the plane
pp. 101 - 125 [ Abstract ] [ Article ] 
DOI: 10.5565/PUBLMAT_41197_06

J.-P. Françoise
The first derivative of the period function of a plane vector field
pp. 127 - 134 [ Abstract ] [ Article ] 
DOI: 10.5565/PUBLMAT_41197_07

E. Freire, E. Ponce, F. Torres
Hopf-like bifurcations in planar piecewise linear systems
pp. 135 - 148 [ Abstract ] [ Article ] 
DOI: 10.5565/PUBLMAT_41197_08

A. Gasull, R. E. Kooij, J. Torregrosa
Limit cycles in the Holling-Tanner model
pp. 149 - 167 [ Abstract ] [ Article ] 
DOI: 10.5565/PUBLMAT_41197_09

C. Gutierrez, F. Sánchez-Bringas
Planar vector field versions of Carathéodory's and Loewner's conjectures
pp. 169 - 179 [ Abstract ] [ Article ] 
DOI: 10.5565/PUBLMAT_41197_10

J. Llibre, E. Ponce
Hopf bifurcation from infinity for planar control systems
pp. 181 - 198 [ Abstract ] [ Article ] 
DOI: 10.5565/PUBLMAT_41197_11

N. G. Lloyd, J. M. Pearson
Five limit cycles for a simple cubic system
pp. 199 - 208 [ Abstract ] [ Article ] 
DOI: 10.5565/PUBLMAT_41197_12

F. Menous
The well-behaved Catalan and Brownian averages and their applications to real resummation
pp. 209 - 222 [ Abstract ] [ Article ] 
DOI: 10.5565/PUBLMAT_41197_13

D. Novikov, S. Yakovenko
Meandering of trajectories of polynomial vector fields in the affine $n$-space
pp. 223 - 242 [ Abstract ] [ Article ] 
DOI: 10.5565/PUBLMAT_41197_14

R. Roussarie
Smoothness property for bifurcation diagrams
pp. 243 - 268 [ Abstract ] [ Article ] 
DOI: 10.5565/PUBLMAT_41197_15

D. Schlomiuk
Basic algebro-geometric concepts in the study of planar polynomial vector fields
pp. 269 - 295 [ Abstract ] [ Article ] 
DOI: 10.5565/PUBLMAT_41197_16

M. A. Teixeira
Generic bifurcation of reversible vector fields on a 2-dimensional manifold
pp. 297 - 316 [ Abstract ] [ Article ] 
DOI: 10.5565/PUBLMAT_41197_17