Finite Group Databasebeta

D261 #10587109

order522
isoclinismisoclinic class of D261
automorphism?
homologyAbelianization (H1) = C2 · Schur multiplier (H2) = C1

Aliases

dihedralD261
unambiguous semidirect productC9⋊D29
unambiguous semidirect productC29⋊D9

Splittings

Fitting, derived, HallC9×C29 ⋊ C2
SylowC29 ⋊ D9
SylowC9 ⋊ D29

Subgroups

subgroupG/H
center, hypercenterC1G
commutator, Fitting, cosocle, hypocenterC9×C29C2
FrattiniC3D87
socleC3×C29D3
LCSG ▷ C9×C29
UCSC1

12 conjugacy classes of subgroups.

Full subgroup data →

Presentation

minimal degreeμ(G) = 38
transitive degreeμt(G) = 261

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

Polycyclic presentation:

2,3,29,3|b^3=d^2,b^a=b^2d,c^a=c^28,d^a=d^2

Conjugacy classes & character table

132 conjugacy classes — view the full character table.

Relationships

maximal subgroup ofD9×D29, C2×D261, D783, …
maximal normal subgroup ofD9×D29, C2×D261, C3×D261, …
maximal quotient ofDic261, C2×D261, D783, …

GAP

Construct this group in GAP via the SmallGroups library:

gap> SmallGroup(522, 3);