A Generalization of a result of Sinnott
A Generalization of a result of Sinnott
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辛诺特结果的推广
DOI:
10.2140/pjm.1997.181.225
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发表时间:
1997
影响因子:
0.6
通讯作者:
H. Kisilevsky
中科院分区:
文献类型:
--
作者:
H. Kisilevsky
Proof. An+1 is a finite Gn+1-module so that An+1 = B ∪ C where B is the set of those elements in An+1 not fixed by any non-trivial element of Gn+1, and C = An+1 \ B. Since Gn+1 is a cyclic group it follows that every element of C is fixed by the the subgroup of order p in Gn+1, and so C ⊆ An = An. The opposite inclusion is clear so C = An. Counting we have, |An+1| = |B|+ |An|. Since B is a union of orbits each of which contains p elements it follows that |An+1| ≡ |An| (mod p).