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《数学学报(英文版)》2008,(4):F0003-F0003
Submission Please type your paper in LaTeX, and e-mail the pdf file. The editorial office will confirm receipt within 3 days. If you do not receive the receipt letter, please send an e-mail to ask. The address is Editorial Board, Acta Mathematica Sinica (English Series), Institute of Mathematics, Chinese Academy of Sciences, Zhongguancun, Beijing 100080, China, email: ActaMath@amss.ac.cn. 相似文献
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<正>年初,《珠算与珠心算》第一二期,连发中国珠协权威性文章展示了大刀阔斧、一往无前的新精神,对我有所触动。第一期钟珠文章,题以《珠心算:传承与弘扬珠算文化的新里程碑》,而第二期以《抓住机遇,继往开来,努力创造珠心算事业的新局面》为题,以示珠 相似文献
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《数学学报》2018,(4):I0001-I0003
Global Phase Portraits of Quadratic Systems with a Complex Ellipse as Invariant Algebraic Curve Jaume LLIBRE Claudia VALLS Abstract In this paper,we study a new class of quadratic systems and classify all its phase portraits.More precisely,we characterize the class of all quadratic polynomial differential 相似文献