山东大学学报(理学版) ›› 2017, Vol. 52 ›› Issue (2): 1-4.doi: 10.6040/j.issn.1671-9352.0.2016.377
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乔虎生,白永发
QIAO Hu-sheng, BAI Yong-fa
摘要: 设S是幺半群。研究了逆S-系的基本性质, 讨论了逆S-系与平坦性质的同调分类问题。
中图分类号:
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