1. College of Information Science and Technology Nanjing Forestry University, Nanjing 210037, China; 2. Department of Mathematics of Southeast University, Nanjing 210096, China
A necessary condition that all cyclic S -posers are flat was given. The condition is not sufficient which is illustrated by an example. The results on S - acts can be also obtained as applications of the results of this paper. The question raised by Bulman-Fleming et al was answered partly.
SHI Xiao-ping1,2, HU Wei qun1, XU Yong-ping1.
Flatness of Cyclic S-posets[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY. 2007, 31(02): 73-77 https://doi.org/10.3969/j.jssn.1000-2006.2007.02.017
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