Subgroup ($H$) information
| Description: | $C_{161}$ |
| Order: | \(161\)\(\medspace = 7 \cdot 23 \) |
| Index: | \(10\)\(\medspace = 2 \cdot 5 \) |
| Exponent: | \(161\)\(\medspace = 7 \cdot 23 \) |
| Generators: |
$b^{460}, b^{35}$
|
| Nilpotency class: | $1$ |
| Derived length: | $1$ |
The subgroup is characteristic (hence normal), a semidirect factor, cyclic (hence abelian, nilpotent, solvable, supersolvable, monomial, elementary ($p = 7,23$), hyperelementary, metacyclic, metabelian, a Z-group, and an A-group), and a Hall subgroup.
Ambient group ($G$) information
| Description: | $D_{805}$ |
| Order: | \(1610\)\(\medspace = 2 \cdot 5 \cdot 7 \cdot 23 \) |
| Exponent: | \(1610\)\(\medspace = 2 \cdot 5 \cdot 7 \cdot 23 \) |
| Derived length: | $2$ |
The ambient group is nonabelian, a Z-group (hence solvable, supersolvable, monomial, metacyclic, metabelian, and an A-group), and hyperelementary for $p = 2$.
Quotient group ($Q$) structure
| Description: | $D_5$ |
| Order: | \(10\)\(\medspace = 2 \cdot 5 \) |
| Exponent: | \(10\)\(\medspace = 2 \cdot 5 \) |
| Automorphism Group: | $F_5$, of order \(20\)\(\medspace = 2^{2} \cdot 5 \) |
| Outer Automorphisms: | $C_2$, of order \(2\) |
| Nilpotency class: | $-1$ |
| Derived length: | $2$ |
The quotient is nonabelian, a Z-group (hence solvable, supersolvable, monomial, metacyclic, metabelian, and an A-group), and hyperelementary for $p = 2$.
Automorphism information
Since the subgroup $H$ is characteristic, the automorphism group $\operatorname{Aut}(G)$ of the ambient group acts on $H$, yielding a homomorphism $\operatorname{res} : \operatorname{Aut}(G) \to \operatorname{Aut}(H)$. The image of $\operatorname{res}$ on the inner automorphism group $\operatorname{Inn}(G)$ is the Weyl group $W = G / Z_G(H)$.
| $\operatorname{Aut}(G)$ | $C_{805}.C_{66}.C_2^3$ |
| $\operatorname{Aut}(H)$ | $C_2\times C_{66}$, of order \(132\)\(\medspace = 2^{2} \cdot 3 \cdot 11 \) |
| $\operatorname{res}(\operatorname{Aut}(G))$ | $C_2\times C_{66}$, of order \(132\)\(\medspace = 2^{2} \cdot 3 \cdot 11 \) |
| $\card{\operatorname{ker}(\operatorname{res})}$ | \(3220\)\(\medspace = 2^{2} \cdot 5 \cdot 7 \cdot 23 \) |
| $W$ | $C_2$, of order \(2\) |
Related subgroups
| Centralizer: | $C_{805}$ | |
| Normalizer: | $D_{805}$ | |
| Complements: | $D_5$ | |
| Minimal over-subgroups: | $C_{805}$ | $D_{161}$ |
| Maximal under-subgroups: | $C_{23}$ | $C_7$ |
Other information
| Möbius function | $5$ |
| Projective image | $D_{805}$ |