NUMBER OF LIMIT CYCLES OF THE BOUNDED QUADRATIC SYSTEM WITH TWO FINITE SINGYLAR POINTS

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Yang Xinan.NUMBER OF LIMIT CYCLES OF THE BOUNDED QUADRATIC SYSTEM WITH TWO FINITE SINGYLAR POINTS[J].Chinese Annals of Mathematics B,1983,4(2):217~226
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Authors:

Yang Xinan;
Abstract: In this paper, the author proves the bounded quadratic system with two singular points at finite which corresponds to figures 12(a),12(b),and 13(b)in [1] has at most one limit cycle, and shows under what conditions the limit cycle exists

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