Finite Group Databasebeta

C7×Dic21 #10596882

order588
isoclinismisoclinic class of D21
automorphism?
homologyAbelianization (H1) = C4×C7 · Schur multiplier (H2) = C1

Aliases

direct productC7×Dic21
unambiguous semidirect productC3⋊(C7×Dic7)
unambiguous semidirect productC7⋊(C7×Dic3)

Splittings

derivedC3×C7 ⋊ C4×C7
HallC3×C72 ⋊ C4
SylowC72 ⋊ Dic3
SylowC3 ⋊ C7×Dic7

Subgroups

subgroupG/H
center, hypercenterC2×C7D21
commutator, hypocenterC3×C7C4×C7
FrattiniC2C7×D21
Fitting, socle, prime radicalC2×C3×C72C2
cosocleC2×C3×C7C2×C7
LCSG ▷ C3×C7
UCSC1 ◁ C2×C7

36 conjugacy classes of subgroups.

Full subgroup data →

Presentation

transitive degreeμt(G) = 84

Conjugacy classes & character table

168 conjugacy classes — view the full character table.

Relationships

maximal subgroup ofC7×Dic3×D7, D3×C7×Dic7, C7×#4245, …
maximal normal subgroup ofC7×Dic3×D7, D3×C7×Dic7, C7×#4245, …
maximal quotient ofC7×C3⋊(C7⋊C8), C2×C7×Dic21, C7×Dic63, …

GAP

Construct this group in GAP via the SmallGroups library:

gap> SmallGroup(588, 30);