简介:Inthispapertheauthordiscussesthevectorfieldssatisfyingtheconditions(C1)and(C2)andprovessometheoremsforthenumberoflimitcyclesoftheplaneautonomoussystems.Someapplicationsofthetheoremsandlemmasin§1aregivenin§2.
THE NUMBER OF LIMIT CYCLESOF THE PLANE AUTONOMOUS SYSTEMS