Finite Group Databasebeta
Cayley diagram

D225 #90638

order450
isoclinismisoclinic class of D225
automorphism?
homologyAbelianization (H1) = C2 · Schur multiplier (H2) = C1

Aliases

dihedralD225
unambiguous semidirect productC9⋊D25
unambiguous semidirect productC25⋊D9

Splittings

Fitting, derived, HallC9×C25 ⋊ C2
SylowC25 ⋊ D9
SylowC9 ⋊ D25

Subgroups

subgroupG/H
center, hypercenterC1G
commutator, Fitting, cosocle, hypocenterC9×C25C2
Frattini, socleC3×C5D15
LCSG ▷ C9×C25
UCSC1

18 conjugacy classes of subgroups.

Full subgroup data →

Presentation

minimal degreeμ(G) = 34
transitive degreeμt(G) = 225

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

Polycyclic presentation:

2,3,5,3,5|b^3=d^2,c^5=e^4,b^a=b^2d,c^a=c^4e,d^a=d^2,e^a=e^4

Conjugacy classes & character table

114 conjugacy classes — view the full character table.

Relationships

maximal subgroup ofD9×D25, C2×D225, D675, …
maximal normal subgroup ofD9×D25, C2×D225, C3×D225, …
maximal quotient ofDic225, C2×D225, D675, …

GAP

Construct this group in GAP via the SmallGroups library:

gap> SmallGroup(450, 3);