Aliases: Q8.C18, C12.2A4, C4oD4:C9, Q8:C9:2C2, C6.6(C2xA4), C3.(C4.A4), C4.(C3.A4), (C3xQ8).3C6, (C3xC4oD4).C3, C2.3(C2xC3.A4), SmallGroup(144,36)
Series: Derived ►Chief ►Lower central ►Upper central
| Q8 — Q8.C18 |
Generators and relations for Q8.C18
G = < a,b,c | a4=1, b2=c18=a2, bab-1=a-1, cac-1=ab, cbc-1=a >
Quotients: C1, C2, C3, C6, C9, A4, C18, C2xA4, C3.A4, C4.A4, C2xC3.A4, Q8.C18
Smallest permutation representation of Q8.C18
►On 72 points
Generators in S72
(1 42 19 60)(2 52 20 70)(3 30 21 12)(4 45 22 63)(5 55 23 37)(6 33 24 15)(7 48 25 66)(8 58 26 40)(9 36 27 18)(10 51 28 69)(11 61 29 43)(13 54 31 72)(14 64 32 46)(16 57 34 39)(17 67 35 49)(38 47 56 65)(41 50 59 68)(44 53 62 71)
(1 28 19 10)(2 43 20 61)(3 53 21 71)(4 31 22 13)(5 46 23 64)(6 56 24 38)(7 34 25 16)(8 49 26 67)(9 59 27 41)(11 52 29 70)(12 62 30 44)(14 55 32 37)(15 65 33 47)(17 58 35 40)(18 68 36 50)(39 48 57 66)(42 51 60 69)(45 54 63 72)
(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 63 64 65 66 67 68 69 70 71 72)
G:=sub<Sym(72)| (1,42,19,60)(2,52,20,70)(3,30,21,12)(4,45,22,63)(5,55,23,37)(6,33,24,15)(7,48,25,66)(8,58,26,40)(9,36,27,18)(10,51,28,69)(11,61,29,43)(13,54,31,72)(14,64,32,46)(16,57,34,39)(17,67,35,49)(38,47,56,65)(41,50,59,68)(44,53,62,71), (1,28,19,10)(2,43,20,61)(3,53,21,71)(4,31,22,13)(5,46,23,64)(6,56,24,38)(7,34,25,16)(8,49,26,67)(9,59,27,41)(11,52,29,70)(12,62,30,44)(14,55,32,37)(15,65,33,47)(17,58,35,40)(18,68,36,50)(39,48,57,66)(42,51,60,69)(45,54,63,72), (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)(37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72)>;
G:=Group( (1,42,19,60)(2,52,20,70)(3,30,21,12)(4,45,22,63)(5,55,23,37)(6,33,24,15)(7,48,25,66)(8,58,26,40)(9,36,27,18)(10,51,28,69)(11,61,29,43)(13,54,31,72)(14,64,32,46)(16,57,34,39)(17,67,35,49)(38,47,56,65)(41,50,59,68)(44,53,62,71), (1,28,19,10)(2,43,20,61)(3,53,21,71)(4,31,22,13)(5,46,23,64)(6,56,24,38)(7,34,25,16)(8,49,26,67)(9,59,27,41)(11,52,29,70)(12,62,30,44)(14,55,32,37)(15,65,33,47)(17,58,35,40)(18,68,36,50)(39,48,57,66)(42,51,60,69)(45,54,63,72), (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)(37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72) );
G=PermutationGroup([[(1,42,19,60),(2,52,20,70),(3,30,21,12),(4,45,22,63),(5,55,23,37),(6,33,24,15),(7,48,25,66),(8,58,26,40),(9,36,27,18),(10,51,28,69),(11,61,29,43),(13,54,31,72),(14,64,32,46),(16,57,34,39),(17,67,35,49),(38,47,56,65),(41,50,59,68),(44,53,62,71)], [(1,28,19,10),(2,43,20,61),(3,53,21,71),(4,31,22,13),(5,46,23,64),(6,56,24,38),(7,34,25,16),(8,49,26,67),(9,59,27,41),(11,52,29,70),(12,62,30,44),(14,55,32,37),(15,65,33,47),(17,58,35,40),(18,68,36,50),(39,48,57,66),(42,51,60,69),(45,54,63,72)], [(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),(37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72)]])
Q8.C18 is a maximal subgroup of
C12.9S4 Q8.C36 C12.3S4 C12.11S4 C12.4S4 2+ 1+4:C9 2- 1+4:C9 Q8:C9:3S3 C9xC4.A4 C36.A4 Q8:C9:4C6
Q8.C18 is a maximal quotient of
C4xQ8:C9 Q8.C54 Q8:C9:3S3
42 conjugacy classes
| class | 1 | 2A | 2B | 3A | 3B | 4A | 4B | 4C | 6A | 6B | 6C | 6D | 9A | ··· | 9F | 12A | 12B | 12C | 12D | 12E | 12F | 18A | ··· | 18F | 36A | ··· | 36L |
| order | 1 | 2 | 2 | 3 | 3 | 4 | 4 | 4 | 6 | 6 | 6 | 6 | 9 | ··· | 9 | 12 | 12 | 12 | 12 | 12 | 12 | 18 | ··· | 18 | 36 | ··· | 36 |
| size | 1 | 1 | 6 | 1 | 1 | 1 | 1 | 6 | 1 | 1 | 6 | 6 | 4 | ··· | 4 | 1 | 1 | 1 | 1 | 6 | 6 | 4 | ··· | 4 | 4 | ··· | 4 |
42 irreducible representations
| dim | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 3 | 3 | 3 | 3 |
| type | + | + | + | + | ||||||||
| image | C1 | C2 | C3 | C6 | C9 | C18 | C4.A4 | Q8.C18 | A4 | C2xA4 | C3.A4 | C2xC3.A4 |
| kernel | Q8.C18 | Q8:C9 | C3xC4oD4 | C3xQ8 | C4oD4 | Q8 | C3 | C1 | C12 | C6 | C4 | C2 |
| # reps | 1 | 1 | 2 | 2 | 6 | 6 | 6 | 12 | 1 | 1 | 2 | 2 |
Matrix representation of Q8.C18 ►in GL2(F37) generated by
| 0 | 36 |
| 1 | 0 |
| 31 | 0 |
| 0 | 6 |
| 26 | 29 |
| 11 | 29 |
G:=sub<GL(2,GF(37))| [0,1,36,0],[31,0,0,6],[26,11,29,29] >;
Q8.C18 in GAP, Magma, Sage, TeX
Q_8.C_{18} % in TeX
G:=Group("Q8.C18"); // GroupNames label
G:=SmallGroup(144,36);
// by ID
G=gap.SmallGroup(144,36);
# by ID
G:=PCGroup([6,-2,-3,-3,-2,2,-2,432,43,441,117,820,202,88]);
// Polycyclic
G:=Group<a,b,c|a^4=1,b^2=c^18=a^2,b*a*b^-1=a^-1,c*a*c^-1=a*b,c*b*c^-1=a>;
// generators/relations
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