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G = D8:4D4order 128 = 27

3rd semidirect product of D8 and D4 acting via D4/C4=C2

p-group, metabelian, nilpotent (class 3), monomial

Aliases: D8:4D4, C42.439C23, C4.1262+ 1+4, D42:5C2, C8:2(C2xD4), C2.56D42, D4:4(C2xD4), (C4xD8):31C2, C8:6D4:3C2, C8:5D4:8C2, D4:6D4:4C2, C4:D8:35C2, C8:D4:30C2, C4:C8:28C22, C4:2(C8:C22), (C4xC8):29C22, C4:C4.359D4, C4:Q8:16C22, D4:D4:37C2, (C2xD4).309D4, (C4xD4):19C22, (C2xD8):29C22, C22:C4.42D4, C4.86(C22xD4), C2.D8:71C22, D4.D4:19C2, C22:SD16:18C2, C4:C4.211C23, C22:C8:24C22, (C2xC4).470C24, (C2xC8).283C23, C23.312(C2xD4), C22:Q8:11C22, D4:C4:81C22, C2.60(D4oSD16), Q8:C4:40C22, (C2xSD16):46C22, (C2xD4).210C23, C4:D4.61C22, C4:1D4.76C22, (C2xQ8).194C23, (C2xM4(2)):22C22, (C22xC4).320C23, C22.730(C22xD4), (C22xD4).399C22, (C2xC8:C22):30C2, (C2xC4).154(C2xD4), C2.72(C2xC8:C22), (C2xC4oD4):15C22, SmallGroup(128,2004)

Series: Derived Chief Lower central Upper central Jennings

C1C2xC4 — D8:4D4
C1C2C22C2xC4C2xD4C22xD4C2xC8:C22 — D8:4D4
C1C2C2xC4 — D8:4D4
C1C22C4xD4 — D8:4D4
C1C2C2C2xC4 — D8:4D4

Generators and relations for D8:4D4
 G = < a,b,c,d | a8=b2=c4=d2=1, bab=cac-1=a-1, dad=a3, cbc-1=a6b, dbd=a2b, dcd=c-1 >

Subgroups: 648 in 273 conjugacy classes, 96 normal (38 characteristic)
C1, C2, C2, C4, C4, C4, C22, C22, C8, C8, C2xC4, C2xC4, C2xC4, D4, D4, Q8, C23, C23, C42, C22:C4, C22:C4, C4:C4, C4:C4, C2xC8, C2xC8, M4(2), D8, D8, SD16, C22xC4, C22xC4, C2xD4, C2xD4, C2xD4, C2xQ8, C4oD4, C24, C4xC8, C22:C8, D4:C4, D4:C4, Q8:C4, C4:C8, C2.D8, C2xC4:C4, C4xD4, C22wrC2, C4:D4, C4:D4, C22:Q8, C22.D4, C4:1D4, C4:Q8, C2xM4(2), C2xD8, C2xD8, C2xSD16, C8:C22, C22xD4, C22xD4, C2xC4oD4, C8:6D4, C4xD8, D4:D4, C22:SD16, C4:D8, D4.D4, C8:D4, C8:5D4, D42, D4:6D4, C2xC8:C22, D8:4D4
Quotients: C1, C2, C22, D4, C23, C2xD4, C24, C8:C22, C22xD4, 2+ 1+4, D42, C2xC8:C22, D4oSD16, D8:4D4

Character table of D8:4D4

 class 12A2B2C2D2E2F2G2H2I2J2K4A4B4C4D4E4F4G4H4I4J4K8A8B8C8D8E8F
 size 11114444448822224448888444488
ρ111111111111111111111111111111    trivial
ρ2111111-1-11-11-1-11-111-1-11-11-1-1-111-11    linear of order 2
ρ311111-111111-1-11-11-1-11-11-1-111-1-1-11    linear of order 2
ρ411111-1-1-11-1111111-11-1-1-1-11-1-1-1-111    linear of order 2
ρ51111-1111-1-1-11-11-111-1-1-11-11-1-111-11    linear of order 2
ρ61111-11-1-1-11-1-11111111-1-1-1-1111111    linear of order 2
ρ71111-1-111-1-1-1-11111-11-1111-1-1-1-1-111    linear of order 2
ρ81111-1-1-1-1-11-11-11-11-1-111-11111-1-1-11    linear of order 2
ρ91111-11-1-1-1-11-1-11-111-1-111-1111-1-11-1    linear of order 2
ρ101111-1111-111111111111-1-1-1-1-1-1-1-1-1    linear of order 2
ρ111111-1-1-1-1-1-1111111-11-1-111-11111-1-1    linear of order 2
ρ121111-1-111-111-1-11-11-1-11-1-111-1-1111-1    linear of order 2
ρ13111111-1-111-1-11111111-1111-1-1-1-1-1-1    linear of order 2
ρ14111111111-1-11-11-111-1-1-1-11-111-1-11-1    linear of order 2
ρ1511111-1-1-111-11-11-11-1-1111-1-1-1-1111-1    linear of order 2
ρ1611111-1111-1-1-11111-11-11-1-111111-1-1    linear of order 2
ρ172-22-2202-2-20000-2020000000-220000    orthogonal lifted from D4
ρ182-22-2-20-2220000-2020000000-220000    orthogonal lifted from D4
ρ1922220-2000-2002-22-22-220000000000    orthogonal lifted from D4
ρ2022220-2000200-2-2-2-222-20000000000    orthogonal lifted from D4
ρ212-22-2-202-220000-20200000002-20000    orthogonal lifted from D4
ρ22222202000-200-2-2-2-2-2220000000000    orthogonal lifted from D4
ρ232-22-220-22-20000-20200000002-20000    orthogonal lifted from D4
ρ242222020002002-22-2-2-2-20000000000    orthogonal lifted from D4
ρ254-4-4400000000-40400000000000000    orthogonal lifted from C8:C22
ρ264-4-440000000040-400000000000000    orthogonal lifted from C8:C22
ρ274-44-400000000040-40000000000000    orthogonal lifted from 2+ 1+4
ρ2844-4-40000000000000000000002-2-2-200    complex lifted from D4oSD16
ρ2944-4-4000000000000000000000-2-22-200    complex lifted from D4oSD16

Smallest permutation representation of D8:4D4
On 32 points
Generators in S32
(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)
(1 24)(2 23)(3 22)(4 21)(5 20)(6 19)(7 18)(8 17)(9 25)(10 32)(11 31)(12 30)(13 29)(14 28)(15 27)(16 26)
(1 30 17 13)(2 29 18 12)(3 28 19 11)(4 27 20 10)(5 26 21 9)(6 25 22 16)(7 32 23 15)(8 31 24 14)
(1 13)(2 16)(3 11)(4 14)(5 9)(6 12)(7 15)(8 10)(17 30)(18 25)(19 28)(20 31)(21 26)(22 29)(23 32)(24 27)

G:=sub<Sym(32)| (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), (1,24)(2,23)(3,22)(4,21)(5,20)(6,19)(7,18)(8,17)(9,25)(10,32)(11,31)(12,30)(13,29)(14,28)(15,27)(16,26), (1,30,17,13)(2,29,18,12)(3,28,19,11)(4,27,20,10)(5,26,21,9)(6,25,22,16)(7,32,23,15)(8,31,24,14), (1,13)(2,16)(3,11)(4,14)(5,9)(6,12)(7,15)(8,10)(17,30)(18,25)(19,28)(20,31)(21,26)(22,29)(23,32)(24,27)>;

G:=Group( (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), (1,24)(2,23)(3,22)(4,21)(5,20)(6,19)(7,18)(8,17)(9,25)(10,32)(11,31)(12,30)(13,29)(14,28)(15,27)(16,26), (1,30,17,13)(2,29,18,12)(3,28,19,11)(4,27,20,10)(5,26,21,9)(6,25,22,16)(7,32,23,15)(8,31,24,14), (1,13)(2,16)(3,11)(4,14)(5,9)(6,12)(7,15)(8,10)(17,30)(18,25)(19,28)(20,31)(21,26)(22,29)(23,32)(24,27) );

G=PermutationGroup([[(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)], [(1,24),(2,23),(3,22),(4,21),(5,20),(6,19),(7,18),(8,17),(9,25),(10,32),(11,31),(12,30),(13,29),(14,28),(15,27),(16,26)], [(1,30,17,13),(2,29,18,12),(3,28,19,11),(4,27,20,10),(5,26,21,9),(6,25,22,16),(7,32,23,15),(8,31,24,14)], [(1,13),(2,16),(3,11),(4,14),(5,9),(6,12),(7,15),(8,10),(17,30),(18,25),(19,28),(20,31),(21,26),(22,29),(23,32),(24,27)]])

Matrix representation of D8:4D4 in GL6(Z)

100000
010000
000010
00000-1
000-100
00-1000
,
100000
010000
000010
000001
001000
000100
,
010000
-100000
00-1000
000100
000001
000010
,
010000
100000
00-1000
000100
00000-1
0000-10

G:=sub<GL(6,Integers())| [1,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,-1,0,0,0,0,-1,0,0,0,1,0,0,0,0,0,0,-1,0,0],[1,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,1,0,0,1,0,0,0,0,0,0,1,0,0],[0,-1,0,0,0,0,1,0,0,0,0,0,0,0,-1,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,1,0],[0,1,0,0,0,0,1,0,0,0,0,0,0,0,-1,0,0,0,0,0,0,1,0,0,0,0,0,0,0,-1,0,0,0,0,-1,0] >;

D8:4D4 in GAP, Magma, Sage, TeX

D_8\rtimes_4D_4
% in TeX

G:=Group("D8:4D4");
// GroupNames label

G:=SmallGroup(128,2004);
// by ID

G=gap.SmallGroup(128,2004);
# by ID

G:=PCGroup([7,-2,2,2,2,-2,2,-2,253,758,723,346,2804,1411,375,172]);
// Polycyclic

G:=Group<a,b,c,d|a^8=b^2=c^4=d^2=1,b*a*b=c*a*c^-1=a^-1,d*a*d=a^3,c*b*c^-1=a^6*b,d*b*d=a^2*b,d*c*d=c^-1>;
// generators/relations

Export

Character table of D8:4D4 in TeX

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Z
F
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