Note on Existence of Periodic Solutions of One Class Differential Equations 
Received:December 21, 1995  
Key Words: differential equation   periodic solution   existence   transformation.  
Fund Project:The subject supported by NJUF.
Author NameAffiliation
Feng Zhaosheng Dept. of Math.
Northern Jiaotong University
Beijing 100044 
Fei Shumin Automatic Institute of Southeast University
Nanjing 210096 
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Abstract:
      In the present paper we investigate the number of periodic solutions of the following differential equation dy/dt=(A1(t)y+A2(t)y2+A3(t)y3)/(a0(t)+a1(t)y+a2(t)y2)(**) which was discussed in paper , and obtain the theorem by the method of cross-ratio of the solutions of (**) without the traditional condition assumption that the functions Ai(t),aj(t) (i=1,2,3; j=0,1,2) are differential.
Citation:
DOI:10.3770/j.issn:1000-341X.1998.03.011
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