Finite Group Databasebeta
Cayley diagram

C5×D20 #6042

order200
isoclinismisoclinic class of Dic10
automorphismAut(G) = C4×D4×AGL(1,𝔽5) (order 640) · Inn(G) = C2×D5 · Out(G) = C2×C42
homologyAbelianization (H1) = C22×C5 · Schur multiplier (H2) = C2

Aliases

direct productC5×D20
unambiguous semidirect productC4⋊(C5×D5)

Splittings

FittingC4×C52 ⋊ C2
SylowC52 ⋊ D4

Subgroups

subgroupG/H
centerC2×C5C2×D5
commutator, cosocleC2×C5C22×C5
FrattiniC2C2×C5×D5
FittingC4×C52C2
socleC2×C52C22
hypercenterC4×C5D5
hypocenterC5C5×D4
LCSG ▷ C2×C5 ▷ C5
UCSC1 ◁ C2×C5 ◁ C4×C5

38 conjugacy classes of subgroups.

Full subgroup data →

Presentation

minimal degreeμ(G) = 14
transitive degreeμt(G) = 40

A minimal faithful permutation representation — 2 generators on 14 points:

(1,2,3,4,5)(6,7,9,10,8)(11,12,13,14);(7,8)(9,10)(12,14)

Conjugacy classes & character table

65 conjugacy classes — view the full character table.

Relationships

maximal subgroup of#87770, #87771, #87772, …
maximal normal subgroup of#87770, #87771, #87772, …
maximal quotient ofC5×#677, C5×D40, C5×Dic20, …

GAP

Construct this group in GAP via the SmallGroups library:

gap> SmallGroup(200, 29);