O teorema de Poincaré-Bendixson em variedades compactas bidimensionais sem bordo

Abstract

Let X be a vector field of class C 2 on bidimensional compact without boundary manifold M2 and γ an orbit of X. The aim of this work is to show Schwartz’s Theorem, which states that if the limit set ω(γ) has not singular points, then ω(γ) is either a closed orbit or ω(γ) = T 2 , and in this case M2 = T 2 . Also some applications of this Theorem will be presented as: Denjoy’s Theorem and that; the orbits of a vector field of class C 2 of the form X = (X1, X2), with X1 ̸= 0, definided on torus are dense on torus if, and only if, the rotation number ρ(f) is irrational.