A Method to Distinguishing Between the Center and the Focus

ZHI Junhai,CHEN Yufu

Journal of System Science and Mathematical Science Chinese Series ›› 2017, Vol. 37 ›› Issue (3) : 863-869.

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Journal of System Science and Mathematical Science Chinese Series ›› 2017, Vol. 37 ›› Issue (3) : 863-869. DOI: 10.12341/jssms13109

A Method to Distinguishing Between the Center and the Focus

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{{article.zuoZheEn_L}}. {{article.title_en}}. Journal of Systems Science and Mathematical Sciences, 2017, 37(3): 863-869 https://doi.org/10.12341/jssms13109

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