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SEMINARS
An Open Problem on Isochronicity
时间  Datetime
2018-06-12 10:30 — 11:30 
地点  Venue
Middle Lecture Room
报告人  Speaker
Weinian Zhang
单位  Affiliation
Sichuan University
邀请人  Host
常微动力系统组
报告摘要  Abstract

  In 2002 X. Jarque and J. Villadelprat proved that no center in a planar polynomial Hamiltonian system of degree 4 is isochronous and raised an open problem: Is there a planar polynomial Hamiltonian system of even degree which has an isochronous center? In this talk we give criteria for nonisochronicity for planar polynomial Hamiltonian systems. Using our criteria, we negatively answer to the problem partly.