Successive bifurcations at infinity for second order O.D.E.’s Marco Sabatini OriginalPaper Pages: 1 - 17
Some remarks about the integration of polynomial planar vector fields Jean Moulin Ollagnier OriginalPaper Pages: 19 - 28
Limit cycles for planar piecewise linear differential systems via first integrals Jaume LlibreEduardo NuñezAntonio E. Teruel OriginalPaper Pages: 29 - 50
A pseudo-normal form for planar vector fields Amadeu DelshamsAntoni GuillamonJ. Tomás Lázaro OriginalPaper Pages: 51 - 82
On the geometric structure of the class of planar quadratic differential systems Robert RoussarieDana Schlomiuk OriginalPaper Pages: 93 - 121
Finite cyclicity of elementary graphics surrounding a focus or center in quadratic systems F. DumortierA. GuzmánC. Rousseau OriginalPaper Pages: 123 - 154
On the period function of centers in planar polynomial hamiltonian systems of degree four Xavier JarqueJordi Villadelprat OriginalPaper Pages: 157 - 180
Structurally stable discontinuous vector fields in the plane Jorge SotomayorAna Lúcia F. Machado OriginalPaper Pages: 227 - 250
Geometry of cycles in quadratic systems Douglas S. ShaferAndré Zegeling OriginalPaper Pages: 251 - 274
Period function for perturbed isochronous centres Emilio FreireArmengol GasullAntoni Guillamon OriginalPaper Pages: 275 - 284