ON THE DECISION PROBLEM OF THE CENTRE OR FOCUS FOR THE SYSTEM x=φ(y)-F(x), y=-g(x)

ON THE DECISION PROBLEM OF THE CENTRE OR FOCUS FOR THE SYSTEM x=φ(y)-F(x), y=-g(x)

Cai Sui-lin, Zhang Ping-guang

Acta Mathematicae Applicatae Sinica ›› 1993, Vol. 16 ›› Issue (1) : 107-113.

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中国科学院数学与系统科学研究院期刊网

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Acta Mathematicae Applicatae Sinica ›› 1993, Vol. 16 ›› Issue (1) : 107-113. DOI: 10.12387/C1993013

ON THE DECISION PROBLEM OF THE CENTRE OR FOCUS FOR THE SYSTEM x=φ(y)-F(x), y=-g(x)

Cai Sui-lin, Zhang Ping-guang

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{{article.zuoZheEn_L}}. {{article.title_en}}. Acta Mathematicae Applicatae Sinica, 1993, 16(1): 107-113 https://doi.org/10.12387/C1993013

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