On the Problem of Structure of Dulac' s Function
Received:November 09, 1981  
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Lü Qilong Jilin Institute of Technologh 
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Abstract:
      This paper deals with the problem of structure of Dulac's function B(x,y) in the theory of limit cycles. We give the useful structural expression and illustrate it by some examples. This expression is as follows.
Citation:
DOI:10.3770/j.issn:1000-341X.1985.02.037
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