EXISTENCE OF PERIONDIC SOLUTIONS FOR AUTONOMOUS PLANAR SYSTEMS
Yang Qigui,Zhang Mou
DOI:10.11835/j.issn.1674-4764.1995.01.005
Received ,Revised , Accepted , Available online July 01, 2015
Volume ,1995,Pages -
- Abstract
In this paper,the existence of periodic solutions for autonomous planar systemsis studied and sufficient conditions for the existence of non-zero periodic solutions of this kind areobtained.Some known results are extended and improved.