D₈₂₀₈ #72213201

order	16416
automorphism	Aut(G) order 21275136
homology	Abelianization (H₁) = C₂² · Schur multiplier (H₂) = C₂

Aliases

dihedral

D₈₂₀₈

Splittings

Fitting	C₁₆×C₁₉×C₂₇ ⋊ C₂
Hall	C₁₉×C₂₇ ⋊ D₁₆
Sylow	C₂₇ ⋊ D₃₀₄
Sylow	C₁₉ ⋊ D₄₃₂

Subgroups

	subgroup	G/H
center	C₂	D₄₁₀₄
commutator, cosocle	C₈×C₁₉×C₂₇	C₂²
Frattini	C₈×C₉	C₂×D₅₇
Fitting	C₁₆×C₁₉×C₂₇	C₂
socle	C₂×C₃×C₁₉	D₇₂
hypercenter	C₁₆	D₅₁₃
hypocenter	C₁₉×C₂₇	D₁₆
LCS	G ▷ C₈×C₁₉×C₂₇ ▷ C₄×C₁₉×C₂₇ ▷ C₂×C₁₉×C₂₇ ▷ C₁₉×C₂₇
UCS	C₁ ◁ C₂ ◁ C₄ ◁ C₈ ◁ C₁₆

112 conjugacy classes of subgroups.

Full subgroup data →

Presentation

minimal degree	μ(G) = 62
transitive degree	μ_t(G) = 8208

A minimal faithful permutation representation — 2 generators on 62 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)(44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62);(2,16)(3,15)(4,14)(5,13)(6,12)(7,11)(8,10)(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)(45,62)(46,61)(47,60)(48,59)(49,58)(50,57)(51,56)(52,55)(53,54)

Polycyclic presentation:

2^5,3,19,3^2|b^2=cd,c^2=de,d^2=e,f^3=h,h^3=i,b^a=bc,c^a=cd,d^a=de,f^a=f^2h^2i^2,g^a=g^18,h^a=h^2i^2,i^a=i^2

Conjugacy classes & character table

4107 conjugacy classes. The character table is too large to display.

Relationships

maximal subgroup of	D₁₆₄₁₆, D₂₄₆₂₄
maximal normal subgroup of	D₁₆₄₁₆
maximal quotient of	Dic₈₂₀₈, D₁₆₄₁₆, D₂₄₆₂₄

GAP

Past the SmallGroups library coverage — no SmallGroups id. Construct it from its polycyclic presentation:

gap> F := FreeGroup(IsSyllableWordsFamily, "a", "b", "c", "d", "e", "f", "g", "h", "i");;
gap> coll := SingleCollector(F, [2, 2, 2, 2, 2, 3, 19, 3, 3]);;
gap> SetPower(coll, 2, F.3*F.4);;
gap> SetPower(coll, 3, F.4*F.5);;
gap> SetPower(coll, 4, F.5);;
gap> SetPower(coll, 6, F.8);;
gap> SetPower(coll, 8, F.9);;
gap> SetConjugate(coll, 2, 1, F.2*F.3);;
gap> SetConjugate(coll, 3, 1, F.3*F.4);;
gap> SetConjugate(coll, 4, 1, F.4*F.5);;
gap> SetConjugate(coll, 6, 1, F.6^2*F.8^2*F.9^2);;
gap> SetConjugate(coll, 7, 1, F.7^18);;
gap> SetConjugate(coll, 8, 1, F.8^2*F.9^2);;
gap> SetConjugate(coll, 9, 1, F.9^2);;
gap> UpdatePolycyclicCollector(coll);;
gap> G := GroupByRws(coll);

D8208 #72213201