Finite Group Databasebeta

D9891 #34089941

order19782
automorphism?
homologyAbelianization (H1) = C2 · Schur multiplier (H2) = C1

Aliases

dihedralD9891
unambiguous semidirect productC7⋊D1413
unambiguous semidirect productC9⋊D1099
unambiguous semidirect productC157⋊D63

Splittings

Fitting, derived, HallC7×C9×C157 ⋊ C2
HallC9×C157 ⋊ D7
HallC7×C157 ⋊ D9
SylowC157 ⋊ D63
HallC7×C9 ⋊ D157
SylowC9 ⋊ D1099
SylowC7 ⋊ D1413

Subgroups

subgroupG/H
center, hypercenterC1G
commutator, Fitting, cosocle, hypocenterC7×C9×C157C2
FrattiniC3D3297
socleC3×C7×C157D3
LCSG ▷ C7×C9×C157
UCSC1

24 conjugacy classes of subgroups.

Full subgroup data →

Presentation

minimal degreeμ(G) = 173
transitive degreeμt(G) = 9891

A minimal faithful permutation representation — 2 generators on 173 points:

(1,2,3,4,5,6,7,8,9)(10,11,12,13,14,15,16)(17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,160,161,162,163,164,165,166,167,168,169,170,171,172,173);(2,9)(3,8)(4,7)(5,6)(11,16)(12,15)(13,14)(18,173)(19,172)(20,171)(21,170)(22,169)(23,168)(24,167)(25,166)(26,165)(27,164)(28,163)(29,162)(30,161)(31,160)(32,159)(33,158)(34,157)(35,156)(36,155)(37,154)(38,153)(39,152)(40,151)(41,150)(42,149)(43,148)(44,147)(45,146)(46,145)(47,144)(48,143)(49,142)(50,141)(51,140)(52,139)(53,138)(54,137)(55,136)(56,135)(57,134)(58,133)(59,132)(60,131)(61,130)(62,129)(63,128)(64,127)(65,126)(66,125)(67,124)(68,123)(69,122)(70,121)(71,120)(72,119)(73,118)(74,117)(75,116)(76,115)(77,114)(78,113)(79,112)(80,111)(81,110)(82,109)(83,108)(84,107)(85,106)(86,105)(87,104)(88,103)(89,102)(90,101)(91,100)(92,99)(93,98)(94,97)(95,96)

Polycyclic presentation:

2,3,7,157,3|b^3=e^2,b^a=b^2e,c^a=c^6,d^a=d^156,e^a=e^2

Conjugacy classes & character table

4947 conjugacy classes. The character table is too large to display.

Relationships

maximal subgroup ofD29673
maximal quotient ofD29673

GAP

Construct this group in GAP via the SmallGroups library:

gap> SmallGroup(19782, 12);