↑

Properties

Label 8T16
Order \(32\)
n \(8\)
Cyclic No
Abelian No
Solvable Yes
Primitive No
$p$-group Yes
Group: $(C_8:C_2):C_2$

Related objects

Learn more about

Group action invariants

Degree $n$ :  $8$
Transitive number $t$ :  $16$
Group :  $(C_8:C_2):C_2$
CHM label :  $1/2[2^{4}]4$
Parity:  $-1$
Primitive:  No
Nilpotency class:  $3$
Generators:  (1,2,3,4,5,6,7,8), (2,6)(3,7)
$|\Aut(F/K)|$:  $2$

Low degree resolvents

|G/N|Galois groups for stem field(s)
2:  $C_2$ x 3
4:  $C_4$ x 2, $C_2^2$
8:  $D_{4}$ x 2, $C_4\times C_2$
16:  $C_2^2:C_4$

Resolvents shown for degrees $\leq 47$

Subfields

Degree 2: $C_2$

Degree 4: $C_4$

Low degree siblings

8T16, 16T36, 16T41 x 2, 32T22

Siblings are shown with degree $\leq 47$

A number field with this Galois group has no arithmetically equivalent fields.

Conjugacy Classes

Cycle TypeSizeOrderRepresentative
$ 1, 1, 1, 1, 1, 1, 1, 1 $ $1$ $1$ $()$
$ 2, 2, 1, 1, 1, 1 $ $4$ $2$ $(3,7)(4,8)$
$ 2, 2, 1, 1, 1, 1 $ $2$ $2$ $(2,6)(4,8)$
$ 8 $ $4$ $8$ $(1,2,3,4,5,6,7,8)$
$ 8 $ $4$ $8$ $(1,2,3,8,5,6,7,4)$
$ 2, 2, 2, 2 $ $4$ $2$ $(1,3)(2,4)(5,7)(6,8)$
$ 4, 4 $ $2$ $4$ $(1,3,5,7)(2,4,6,8)$
$ 4, 4 $ $2$ $4$ $(1,3,5,7)(2,8,6,4)$
$ 8 $ $4$ $8$ $(1,4,7,6,5,8,3,2)$
$ 8 $ $4$ $8$ $(1,4,3,6,5,8,7,2)$
$ 2, 2, 2, 2 $ $1$ $2$ $(1,5)(2,6)(3,7)(4,8)$

Group invariants

Order:  $32=2^{5}$
Cyclic:  No
Abelian:  No
Solvable:  Yes
GAP id:  [32, 7]
Character table:    
      2  5  3  4  3  3  3  4  4  3  3  5

        1a 2a 2b 8a 8b 2c 4a 4b 8c 8d 2d
     2P 1a 1a 1a 4a 4b 1a 2d 2d 4b 4a 1a
     3P 1a 2a 2b 8d 8c 2c 4a 4b 8b 8a 2d
     5P 1a 2a 2b 8a 8b 2c 4a 4b 8c 8d 2d
     7P 1a 2a 2b 8d 8c 2c 4a 4b 8b 8a 2d

X.1      1  1  1  1  1  1  1  1  1  1  1
X.2      1 -1  1 -1  1 -1  1  1  1 -1  1
X.3      1 -1  1  1 -1 -1  1  1 -1  1  1
X.4      1  1  1 -1 -1  1  1  1 -1 -1  1
X.5      1 -1  1  A -A  1 -1 -1  A -A  1
X.6      1 -1  1 -A  A  1 -1 -1 -A  A  1
X.7      1  1  1  A  A -1 -1 -1 -A -A  1
X.8      1  1  1 -A -A -1 -1 -1  A  A  1
X.9      2  . -2  .  .  . -2  2  .  .  2
X.10     2  . -2  .  .  .  2 -2  .  .  2
X.11     4  .  .  .  .  .  .  .  .  . -4

A = -E(4)
  = -Sqrt(-1) = -i