Subgroup ($H$) information
| Description: | $C_{20}:C_{20}$ |
| Order: | \(400\)\(\medspace = 2^{4} \cdot 5^{2} \) |
| Index: | \(2\) |
| Exponent: | \(20\)\(\medspace = 2^{2} \cdot 5 \) |
| Generators: |
$ac^{5}, c^{4}, b^{4}, b^{10}, b^{5}, c^{10}$
|
| Derived length: | $2$ |
The subgroup is normal, maximal, a direct factor, nonabelian, and metacyclic (hence solvable, supersolvable, monomial, and metabelian).
Ambient group ($G$) information
| Description: | $C_{10}^2.D_4$ |
| Order: | \(800\)\(\medspace = 2^{5} \cdot 5^{2} \) |
| Exponent: | \(20\)\(\medspace = 2^{2} \cdot 5 \) |
| Derived length: | $2$ |
The ambient group is nonabelian, supersolvable (hence solvable and monomial), and metabelian.
Quotient group ($Q$) structure
| Description: | $C_2$ |
| Order: | \(2\) |
| Exponent: | \(2\) |
| Automorphism Group: | $C_1$, of order $1$ |
| Outer Automorphisms: | $C_1$, of order $1$ |
| Derived length: | $1$ |
The quotient is cyclic (hence abelian, nilpotent, solvable, supersolvable, monomial, elementary, hyperelementary, metacyclic, metabelian, a Z-group, and an A-group), a $p$-group, simple, and rational.
Automorphism information
While the subgroup $H$ is not characteristic, the stabilizer $S$ of $H$ in the automorphism group $\operatorname{Aut}(G)$ of the ambient group acts on $H$, yielding a homomorphism $\operatorname{res} : S \to \operatorname{Aut}(H)$. The image of $\operatorname{res}$ on the inner automorphisms $\operatorname{Inn}(G) \cap S$ is the Weyl group $W = N_G(H) / Z_G(H)$.
| $\operatorname{Aut}(G)$ | $C_5:(C_4^2\times C_2^6.C_2^3)$ |
| $\operatorname{Aut}(H)$ | $C_2^{16}.\PSL(2,7)$, of order \(2560\)\(\medspace = 2^{9} \cdot 5 \) |
| $\operatorname{res}(S)$ | $C_2^{16}.\PSL(2,7)$, of order \(2560\)\(\medspace = 2^{9} \cdot 5 \) |
| $\card{\operatorname{ker}(\operatorname{res})}$ | \(4\)\(\medspace = 2^{2} \) |
| $W$ | $D_{10}$, of order \(20\)\(\medspace = 2^{2} \cdot 5 \) |
Related subgroups
| Centralizer: | $C_2^2\times C_{10}$ | |||
| Normalizer: | $C_{10}^2.D_4$ | |||
| Complements: | $C_2$ | |||
| Minimal over-subgroups: | $C_{10}^2.D_4$ | |||
| Maximal under-subgroups: | $C_{10}\times C_{20}$ | $C_{10}:C_{20}$ | $C_{20}:C_4$ | $C_4:C_{20}$ |
Other information
| Number of subgroups in this autjugacy class | $4$ |
| Number of conjugacy classes in this autjugacy class | $4$ |
| Möbius function | $-1$ |
| Projective image | $C_2\times D_{10}$ |