Finite Group Databasebeta
Cayley diagram

D245 #92436

order490
isoclinismisoclinic class of D245
automorphism?
homologyAbelianization (H1) = C2 · Schur multiplier (H2) = C1

Aliases

dihedralD245
unambiguous semidirect productC5⋊D49
unambiguous semidirect productC49⋊D5

Splittings

Fitting, derived, HallC5×C49 ⋊ C2
SylowC49 ⋊ D5
SylowC5 ⋊ D49

Subgroups

subgroupG/H
center, hypercenterC1G
commutator, Fitting, cosocle, hypocenterC5×C49C2
FrattiniC7D35
socleC5×C7D7
LCSG ▷ C5×C49
UCSC1

12 conjugacy classes of subgroups.

Full subgroup data →

Presentation

minimal degreeμ(G) = 54
transitive degreeμt(G) = 245

A minimal faithful permutation representation — 2 generators on 54 points:

(1,2,3,4,5)(6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54);(2,5)(3,4)(7,54)(8,53)(9,52)(10,51)(11,50)(12,49)(13,48)(14,47)(15,46)(16,45)(17,44)(18,43)(19,42)(20,41)(21,40)(22,39)(23,38)(24,37)(25,36)(26,35)(27,34)(28,33)(29,32)(30,31)

Polycyclic presentation:

2,5,7^2|c^7=d^6,b^a=b^4,c^a=c^6d,d^a=d^6

Conjugacy classes & character table

124 conjugacy classes — view the full character table.

Relationships

maximal subgroup ofD5×D49, C2×D245, C5⋊(D49⋊C3), …
maximal normal subgroup ofD5×D49, C2×D245, C5⋊(D49⋊C3), …
maximal quotient ofDic245, C2×D245, C3×D245, …

GAP

Construct this group in GAP via the SmallGroups library:

gap> SmallGroup(490, 3);