Finite Group Databasebeta

D279 #10587816

order558
isoclinismisoclinic class of D279
automorphism?
homologyAbelianization (H1) = C2 · Schur multiplier (H2) = C1

Aliases

dihedralD279
unambiguous semidirect productC9⋊D31
unambiguous semidirect productC31⋊D9

Splittings

Fitting, derived, HallC9×C31 ⋊ C2
SylowC31 ⋊ D9
SylowC9 ⋊ D31

Subgroups

subgroupG/H
center, hypercenterC1G
commutator, Fitting, cosocle, hypocenterC9×C31C2
FrattiniC3D93
socleC3×C31D3
LCSG ▷ C9×C31
UCSC1

12 conjugacy classes of subgroups.

Full subgroup data →

Presentation

minimal degreeμ(G) = 40
transitive degreeμt(G) = 279

A minimal faithful permutation representation — 2 generators on 40 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);(2,9)(3,8)(4,7)(5,6)(11,40)(12,39)(13,38)(14,37)(15,36)(16,35)(17,34)(18,33)(19,32)(20,31)(21,30)(22,29)(23,28)(24,27)(25,26)

Polycyclic presentation:

2,3,31,3|b^3=d^2,b^a=b^2d,c^a=c^30,d^a=d^2

Conjugacy classes & character table

141 conjugacy classes — view the full character table.

Relationships

maximal subgroup ofD9×D31, C2×D279, D837, …
maximal normal subgroup ofD9×D31, C2×D279, (C31⋊C3)⋊D9, …
maximal quotient ofDic279, C2×D279, D837, …

GAP

Construct this group in GAP via the SmallGroups library:

gap> SmallGroup(558, 5);