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G = C8.C24order 128 = 27

6th non-split extension by C8 of C24 acting via C24/C22=C22

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

Aliases: C8.6C24, C4.11C25, D8.8C23, D4.8C24, Q8.8C24, Q16.10C23, SD16.3C23, M4(2).20C23, 2- 1+49C22, 2+ 1+410C22, D8(C4○D4), C4(D4○D8), D4(C4○D8), D4○D88C2, C4(Q8○D8), Q8(C4○D8), Q8○D88C2, Q16(C4○D4), SD16(C4○D4), C4(D4○SD16), D4○SD167C2, C4○D4.60D4, D4.64(C2×D4), Q8.66(C2×D4), (C2×D4).247D4, C4○D812C22, C8○D416C22, (C2×D8)⋊58C22, (C2×Q8).192D4, C2.46(D4×C23), C8⋊C2214C22, C2.C255C2, (C2×C8).586C23, (C2×C4).148C24, (C22×C8)⋊30C22, (C2×Q16)⋊62C22, C4○D4.17C23, C23.120(C2×D4), C4.128(C22×D4), D8⋊C2210C2, (C2×SD16)⋊64C22, (C2×D4).347C23, C8.C2215C22, (C2×Q8).324C23, C22.20(C22×D4), (C2×M4(2))⋊61C22, (C22×C4).1228C23, C4○D4(C4○D8), (C2×C8○D4)⋊13C2, (C2×C4○D8)⋊33C2, (C2×C4).1116(C2×D4), (C2×C4○D4)⋊58C22, SmallGroup(128,2316)

Series: Derived Chief Lower central Upper central Jennings

C1C4 — C8.C24
C1C2C4C2×C4C22×C4C2×C4○D4C2.C25 — C8.C24
C1C2C4 — C8.C24
C1C4C2×C4○D4 — C8.C24
C1C2C2C4 — C8.C24

Generators and relations for C8.C24
 G = < a,b,c,d,e | a8=b2=c2=1, d2=a6, e2=a4, bab=a-1, cac=a5, ad=da, ae=ea, bc=cb, dbd-1=a6b, be=eb, cd=dc, ce=ec, de=ed >

Subgroups: 1092 in 712 conjugacy classes, 426 normal (13 characteristic)
C1, C2, C2 [×15], C4 [×2], C4 [×6], C4 [×8], C22, C22 [×6], C22 [×23], C8 [×2], C8 [×6], C2×C4, C2×C4 [×15], C2×C4 [×44], D4 [×20], D4 [×44], Q8 [×12], Q8 [×12], C23 [×3], C23 [×12], C2×C8, C2×C8 [×15], M4(2) [×12], D8 [×16], SD16 [×32], Q16 [×16], C22×C4 [×3], C22×C4 [×12], C2×D4 [×15], C2×D4 [×36], C2×Q8, C2×Q8 [×12], C2×Q8 [×8], C4○D4 [×40], C4○D4 [×56], C22×C8 [×3], C2×M4(2) [×3], C8○D4 [×8], C2×D8 [×6], C2×SD16 [×12], C2×Q16 [×6], C4○D8 [×40], C8⋊C22 [×24], C8.C22 [×24], C2×C4○D4, C2×C4○D4 [×12], C2×C4○D4 [×8], 2+ 1+4 [×8], 2+ 1+4 [×6], 2- 1+4 [×8], 2- 1+4 [×2], C2×C8○D4, C2×C4○D8 [×6], D8⋊C22 [×6], D4○D8 [×4], D4○SD16 [×8], Q8○D8 [×4], C2.C25 [×2], C8.C24
Quotients: C1, C2 [×31], C22 [×155], D4 [×8], C23 [×155], C2×D4 [×28], C24 [×31], C22×D4 [×14], C25, D4×C23, C8.C24

Smallest permutation representation of C8.C24
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 16)(2 15)(3 14)(4 13)(5 12)(6 11)(7 10)(8 9)(17 31)(18 30)(19 29)(20 28)(21 27)(22 26)(23 25)(24 32)
(1 25)(2 30)(3 27)(4 32)(5 29)(6 26)(7 31)(8 28)(9 20)(10 17)(11 22)(12 19)(13 24)(14 21)(15 18)(16 23)
(1 9 7 15 5 13 3 11)(2 10 8 16 6 14 4 12)(17 28 23 26 21 32 19 30)(18 29 24 27 22 25 20 31)
(1 27 5 31)(2 28 6 32)(3 29 7 25)(4 30 8 26)(9 22 13 18)(10 23 14 19)(11 24 15 20)(12 17 16 21)

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

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

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

44 conjugacy classes

class 1 2A2B···2H2I···2P4A4B4C···4I4J···4Q8A8B8C8D8E···8J
order122···22···2444···44···488888···8
size112···24···4112···24···422224···4

44 irreducible representations

dim111111112224
type+++++++++++
imageC1C2C2C2C2C2C2C2D4D4D4C8.C24
kernelC8.C24C2×C8○D4C2×C4○D8D8⋊C22D4○D8D4○SD16Q8○D8C2.C25C2×D4C2×Q8C4○D4C1
# reps116648423144

Matrix representation of C8.C24 in GL4(𝔽17) generated by

0066
30011
0141414
141433
,
160150
10116
0010
1616160
,
4800
131300
131304
04130
,
111100
3000
03143
14141414
,
13000
01300
00130
00013
G:=sub<GL(4,GF(17))| [0,3,0,14,0,0,14,14,6,0,14,3,6,11,14,3],[16,1,0,16,0,0,0,16,15,1,1,16,0,16,0,0],[4,13,13,0,8,13,13,4,0,0,0,13,0,0,4,0],[11,3,0,14,11,0,3,14,0,0,14,14,0,0,3,14],[13,0,0,0,0,13,0,0,0,0,13,0,0,0,0,13] >;

C8.C24 in GAP, Magma, Sage, TeX

C_8.C_2^4
% in TeX

G:=Group("C8.C2^4");
// GroupNames label

G:=SmallGroup(128,2316);
// by ID

G=gap.SmallGroup(128,2316);
# by ID

G:=PCGroup([7,-2,2,2,2,2,-2,-2,477,521,172,4037,2028,124]);
// Polycyclic

G:=Group<a,b,c,d,e|a^8=b^2=c^2=1,d^2=a^6,e^2=a^4,b*a*b=a^-1,c*a*c=a^5,a*d=d*a,a*e=e*a,b*c=c*b,d*b*d^-1=a^6*b,b*e=e*b,c*d=d*c,c*e=e*c,d*e=e*d>;
// generators/relations

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