Finite Group Databasebeta

#34205570

order20224
automorphism?
homologyAbelianization (H1) = C22×C4 · Schur multiplier (H2) = C25

Aliases

No aliases for this group.

Splittings

FittingC79×#1390 ⋊ C2
SylowC79 ⋊ #13047

Subgroups

subgroupG/H
centerC22#19098751
commutatorC2×D4×C79C22×C4
FrattiniC22×D4C22×D79
FittingC79×#1390C2
socleC22×C79B(4,𝔽2)
prime radicalC2×#19098733C2
cosocleC22×D4×C79C23
hypercenter#1390D79
hypocenterC79#13047
LCSG ▷ C2×D4×C79 ▷ C22×C79 ▷ C2×C79 ▷ C79
UCSC1 ◁ C22 ◁ C23 ◁ C22×D4 ◁ #1390

888 conjugacy classes of subgroups; only the 89 normal subgroups are shown.

normal subgroups only

This group has 888 conjugacy classes of subgroups — too many to draw. Only its 89 normal subgroups are shown.

Dotted edges: containments with no intermediate normal subgroup — omitted non-normal subgroups may lie between.

Full subgroup data →

Presentation

minimal degreeμ(G) = 91
transitive degreeμt(G) = 2528

A minimal faithful permutation representation — 3 generators on 91 points:

(6,9)(7,12)(10,11)(13,14)(15,16)(17,18)(19,20)(21,22)(23,24)(25,26)(27,28)(29,30)(31,32)(33,34)(35,36)(37,38)(39,40)(41,42)(43,44)(45,46)(47,48)(49,50)(51,52)(53,54)(55,56)(57,58)(59,60)(61,62)(63,64)(65,66)(67,68)(69,70)(71,72)(73,74)(75,76)(77,78)(79,80)(81,82)(83,84)(85,86)(87,88)(89,90);(1,3,4,2)(7,12)(14,15)(16,17)(18,19)(20,21)(22,23)(24,25)(26,27)(28,29)(30,31)(32,33)(34,35)(36,37)(38,39)(40,41)(42,43)(44,45)(46,47)(48,49)(50,51)(52,53)(54,55)(56,57)(58,59)(60,61)(62,63)(64,65)(66,67)(68,69)(70,71)(72,73)(74,75)(76,77)(78,79)(80,81)(82,83)(84,85)(86,87)(88,89)(90,91);(1,2,4,3)(5,6)(7,10,12,9)(8,11)

Polycyclic presentation:

2^8,79|a^2=f,b^2=df,e^2=h,b^a=bd,c^a=ce,e^a=egh,g^a=gh,e^b=egh,i^b=i^78,d^c=dg,e^c=eh,f^c=fg,i^c=i^78,e^d=eh,f^e=fh

Conjugacy classes & character table

1054 conjugacy classes. The character table is too large to display.

GAP

Construct this group in GAP via the SmallGroups library:

gap> SmallGroup(20224, 86869);