Loewy lengths of blocks with abelian defect groups
Loewy lengths of blocks with abelian defect groups
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具有阿贝尔缺陷群的块的洛威长度
DOI:
10.1090/bproc/28
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发表时间:
2017
期刊:
影响因子:
--
通讯作者:
Eaton C
中科院分区:
文献类型:
--
作者:
Eaton C
We consider-blocks with abelian defect groups and in the first part prove a relationship between its Loewy length and that for blocks of normal subgroups of index. Using this, we show that ifis a-block of a finite group with abelian defect group, wherefor alland, then $ d<\operatorname {LL}(B)\leq 2^{a_1}+\cdots+ 2^{a_r}+ 2s-r+ 1$, where. Whenthe upper bound can be improved to. Together these give sharp upper bounds for every isomorphism type of. A consequence is that whenis an abelian-group the Loewy length is bounded above byexcept whenis a Klein-four group andis Morita equivalent to the principal block of. We conjecture similar bounds for arbitrary primes and give evidence that it holds for principal-blocks. References
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DOI:
10.1017/cbo9780511623592
发表时间:
1986
期刊:
--
影响因子:
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通讯作者:
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