X

G

$\Gamma$

备注

$\left({\text{A}}_{10}\times {\text{A}}_{10}\right):{\mathbb{Z}}_4$

${\text{A}}_9:{\text{S}}_{10}$

引理3.2

${\mathbb{Z}}_2^{10}:{\text{S}}_{10}$

${\mathbb{Z}}_2^9:{\text{S}}_9$

引理3.3

${\text{A}}_{20}:{\mathbb{Z}}_2$

${\text{A}}_{19}:{\mathbb{Z}}_2$

引理3.4

至少2个图