Properties

Label 21T38
Degree $21$
Order $5040$
Cyclic no
Abelian no
Solvable no
Primitive yes
$p$-group no
Group: $S_7$

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Show commands: Magma

magma: G := TransitiveGroup(21, 38);
 

Group action invariants

Degree $n$:  $21$
magma: t, n := TransitiveGroupIdentification(G); n;
 
Transitive number $t$:  $38$
magma: t, n := TransitiveGroupIdentification(G); t;
 
Group:  $S_7$
Parity:  $-1$
magma: IsEven(G);
 
Primitive:  yes
magma: IsPrimitive(G);
 
magma: NilpotencyClass(G);
 
$\card{\Aut(F/K)}$:  $1$
magma: Order(Centralizer(SymmetricGroup(n), G));
 
Generators:  (1,7,12,16,19,21,6)(2,8,13,17,20,5,11)(3,9,14,18,4,10,15), (2,3)(4,5,6)(7,8)(9,10,11)(13,17,15,16,14,18)(19,21,20)
magma: Generators(G);
 

Low degree resolvents

|G/N|Galois groups for stem field(s)
$2$:  $C_2$

Resolvents shown for degrees $\leq 47$

Subfields

Degree 3: None

Degree 7: None

Low degree siblings

7T7, 14T46, 30T565, 35T31, 42T411, 42T412, 42T413, 42T418

Siblings are shown with degree $\leq 47$

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

Conjugacy classes

LabelCycle TypeSizeOrderRepresentative
$ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 $ $1$ $1$ $()$
$ 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 $ $21$ $2$ $( 2, 6)( 7,11)(12,18)(13,20)(14,21)$
$ 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1 $ $70$ $3$ $( 1,10, 8)( 2,14,12)( 3, 5,17)( 4,19,16)( 6,21,18)$
$ 6, 3, 3, 3, 2, 2, 1, 1 $ $420$ $6$ $( 1, 8,10)( 2,18,14, 6,12,21)( 3,17, 5)( 4,16,19)( 7,11)(13,20)$
$ 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1 $ $105$ $2$ $( 1,16)( 2,12)( 4, 8)( 5,17)( 6,18)( 7,13)(10,19)(11,20)$
$ 4, 4, 4, 4, 2, 1, 1, 1 $ $210$ $4$ $( 1, 8,16, 4)( 2, 7,12,13)( 3, 9)( 5,10,17,19)( 6,11,18,20)$
$ 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1 $ $105$ $2$ $( 1,16)( 2,12)( 4, 8)( 5,18)( 6,17)( 7,13)(10,20)(11,19)(14,15)$
$ 3, 3, 3, 3, 3, 3, 3 $ $280$ $3$ $( 1,11, 6)( 2, 7,15)( 3, 9,21)( 4,10,18)( 5, 8,20)(12,13,14)(16,19,17)$
$ 6, 6, 3, 2, 2, 1, 1 $ $210$ $6$ $( 1,14, 8, 2,10,12)( 3, 5,17)( 4,21,16, 6,19,18)( 9,15)(11,13)$
$ 12, 4, 3, 2 $ $420$ $12$ $( 1,16,14, 6, 8,19, 2,18,10, 4,12,21)( 3,17, 5)( 7,20)( 9,13,15,11)$
$ 5, 5, 5, 5, 1 $ $504$ $5$ $( 1, 3,16,19,10)( 2,12,13,14, 7)( 4,17, 9, 5, 8)( 6,18,20,21,11)$
$ 10, 5, 5, 1 $ $504$ $10$ $( 1,19, 3,10,16)( 2,21,12,11,13, 6,14,18, 7,20)( 4, 5,17, 8, 9)$
$ 6, 6, 6, 3 $ $840$ $6$ $( 1, 4, 2, 6, 5, 3)( 7,20,14,18,10,16)( 8, 9,13,15,21,17)(11,19,12)$
$ 4, 4, 4, 4, 2, 2, 1 $ $630$ $4$ $( 1, 8,16, 4)( 2, 7,12,13)( 3, 9)( 5,11,17,20)( 6,10,18,19)(14,15)$
$ 7, 7, 7 $ $720$ $7$ $( 1,12, 4,18,19,11,14)( 2, 3,16,20,21,10, 7)( 5, 8,13, 6,17, 9,15)$

magma: ConjugacyClasses(G);
 

Group invariants

Order:  $5040=2^{4} \cdot 3^{2} \cdot 5 \cdot 7$
magma: Order(G);
 
Cyclic:  no
magma: IsCyclic(G);
 
Abelian:  no
magma: IsAbelian(G);
 
Solvable:  no
magma: IsSolvable(G);
 
Nilpotency class:   not nilpotent
Label:  5040.w
magma: IdentifyGroup(G);
 
Character table:

Size
2 P
3 P
5 P
7 P
Type

magma: CharacterTable(G);