The abelian monoid of fusion-stable finite sets is free
The abelian monoid of fusion-stable finite sets is free
复制标题
融合稳定有限集的阿贝尔幺半群是自由的
DOI:
10.2140/ant.2015.9.2303
复制
发表时间:
2013
期刊:
影响因子:
--
通讯作者:
Sune Precht Reeh
中科院分区:
文献类型:
--
作者:
Sune Precht Reeh
We show that the abelian monoid of isomorphism classes of G-stable finite S-sets is free for a finite group G with Sylow p-subgroup S; here a finite S-set is called G-stable if it has isomorphic restrictions to G-conjugate subgroups of S. These G-stable S-sets are of interest, e.g., in homotopy theory. We prove freeness by constructing an explicit (but somewhat non-obvious) basis, whose elements are in one-to-one correspondence with the G-conjugacy classes of subgroups in S. As a central tool of independent interest, we give a detailed description of the embedding of the Burnside ring for a saturated fusion system into its associated ghost ring.
DOI:
10.1112/jlms/jdp048
发表时间:
2009
期刊:
Journal of the London Mathematical Society
影响因子:
--
作者:
Díaz A
通讯作者:
Díaz A