Finite Group Databasebeta
Cayley diagram

D189 #67352

order378
isoclinismisoclinic class of D189
automorphism?
homologyAbelianization (H1) = C2 · Schur multiplier (H2) = C1

Aliases

dihedralD189
unambiguous semidirect productC7⋊D27
unambiguous semidirect productC27⋊D7

Splittings

Fitting, derived, HallC7×C27 ⋊ C2
SylowC27 ⋊ D7
SylowC7 ⋊ D27

Subgroups

subgroupG/H
center, hypercenterC1G
commutator, Fitting, cosocle, hypocenterC7×C27C2
FrattiniC9D21
socleC3×C7D9
LCSG ▷ C7×C27
UCSC1

16 conjugacy classes of subgroups.

Full subgroup data →

Presentation

minimal degreeμ(G) = 34
transitive degreeμt(G) = 189

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);(2,27)(3,26)(4,25)(5,24)(6,23)(7,22)(8,21)(9,20)(10,19)(11,18)(12,17)(13,16)(14,15)(29,34)(30,33)(31,32)

Polycyclic presentation:

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

Conjugacy classes & character table

96 conjugacy classes — view the full character table.

Relationships

maximal subgroup ofD7×D27, C2×D189, D567, …
maximal normal subgroup ofD7×D27, C2×D189, ΓL(1,𝔽8)⋊D27, …
maximal quotient ofDic189, C2×D189, D567, …

GAP

Construct this group in GAP via the SmallGroups library:

gap> SmallGroup(378, 5);