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Published:1995
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[J]. Journal of Civil and Environmental Engineering, 1995, 17(4): 66-72.
DOI:
[J]. Journal of Civil and Environmental Engineering, 1995, 17(4): 66-72. DOI: 10.11835/j.issn.1674-4764.1995.04.009.
研究一般平面自治系统x=P(x,y),y=Q(x,y)的闭轨的存在性,获得了保证此系统存在闭轨的几组充分条件。推广和改进了一些已知结果。
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