Finite Group Databasebeta

Dic18⋊C9 #10619595

order648
automorphism?
homologyAbelianization (H1) = C22×C9 · Schur multiplier (H2) = C1

Aliases

unambiguous semidirect productDic18⋊C9
unambiguous semidirect product(C9⋊C9)⋊Q8

Splittings

SylowC9⋊C9 ⋊ Q8

Subgroups

subgroupG/H
centerC2×C3C2×AGL(1,ℤ/9)
commutatorC2×C9C22×C9
Frattini, socle, prime radicalC2×C32C2×C3×D3
FittingC4×C9⋊C9C2
cosocleC2×C3×C9C22×C3
hypercenterC3×C4AGL(1,ℤ/9)
hypocenterC9Q8×C9
LCSG ▷ C2×C9 ▷ C9
UCSC1 ◁ C2×C3 ◁ C3×C4

66 conjugacy classes of subgroups.

Full subgroup data →

Presentation

transitive degreeμt(G) = 72

Polycyclic presentation:

2^2,3,2,3^3|a^2=d,b^2=d,c^3=e,f^3=g,b^a=bd,f^a=f^2g^2,g^a=g^2,f^c=fg^2

Conjugacy classes & character table

93 conjugacy classes — view the full character table.

Relationships

maximal subgroup ofDic36⋊C9, #3664⋊C9, #3672⋊C9, …
maximal normal subgroup ofDic36⋊C9, #3664⋊C9, #3672⋊C9, …
maximal quotient of(Dic9⋊C4)⋊C9, C4⋊(Dic9⋊C9), C2×Dic18⋊C9, …

GAP

Construct this group in GAP via the SmallGroups library:

gap> SmallGroup(648, 114);