metabelian, supersoluble, monomial, 2-hyperelementary
Aliases: C20.25C42, (C2xC8).3F5, (C2xC40).9C4, D5:C8.3C4, C4.30(C4xF5), (C4xD5).52D4, D10.5(C4:C4), C5:(C4.10C42), C22.2(C4:F5), (C22xD5).7Q8, (C2xDic5).99D4, C4.27(C22:F5), C20.27(C22:C4), D5:M4(2).10C2, Dic5.4(C22:C4), C2.13(D10.3Q8), C10.12(C2.C42), (C2xC5:2C8).5C4, (C4xD5).44(C2xC4), (C2xC8:D5).9C2, (C2xC4).128(C2xF5), (C2xC10).15(C4:C4), (C2xC20).143(C2xC4), (C2xC4xD5).283C22, SmallGroup(320,235)
Series: Derived ►Chief ►Lower central ►Upper central
Generators and relations for C20.25C42
G = < a,b,c | a20=1, b4=c4=a10, bab-1=a13, ac=ca, cbc-1=a5b >
Subgroups: 322 in 86 conjugacy classes, 34 normal (20 characteristic)
C1, C2, C2, C4, C4, C22, C22, C5, C8, C2xC4, C2xC4, C23, D5, C10, C10, C2xC8, C2xC8, M4(2), C22xC4, Dic5, C20, D10, D10, C2xC10, C2xM4(2), C5:2C8, C40, C5:C8, C4xD5, C2xDic5, C2xC20, C22xD5, C4.10C42, C8:D5, C2xC5:2C8, C2xC40, D5:C8, C4.F5, C22.F5, C2xC4xD5, C2xC8:D5, D5:M4(2), C20.25C42
Quotients: C1, C2, C4, C22, C2xC4, D4, Q8, C42, C22:C4, C4:C4, F5, C2.C42, C2xF5, C4.10C42, C4xF5, C4:F5, C22:F5, D10.3Q8, C20.25C42
►On 80 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 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80)
(1 48 16 43 11 58 6 53)(2 45 5 56 12 55 15 46)(3 42 14 49 13 52 4 59)(7 50 10 41 17 60 20 51)(8 47 19 54 18 57 9 44)(21 71 26 76 31 61 36 66)(22 68 35 69 32 78 25 79)(23 65 24 62 33 75 34 72)(27 73 40 74 37 63 30 64)(28 70 29 67 38 80 39 77)
(1 21 16 36 11 31 6 26)(2 22 17 37 12 32 7 27)(3 23 18 38 13 33 8 28)(4 24 19 39 14 34 9 29)(5 25 20 40 15 35 10 30)(41 79 46 64 51 69 56 74)(42 80 47 65 52 70 57 75)(43 61 48 66 53 71 58 76)(44 62 49 67 54 72 59 77)(45 63 50 68 55 73 60 78)
G:=sub<Sym(80)| (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)(61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80), (1,48,16,43,11,58,6,53)(2,45,5,56,12,55,15,46)(3,42,14,49,13,52,4,59)(7,50,10,41,17,60,20,51)(8,47,19,54,18,57,9,44)(21,71,26,76,31,61,36,66)(22,68,35,69,32,78,25,79)(23,65,24,62,33,75,34,72)(27,73,40,74,37,63,30,64)(28,70,29,67,38,80,39,77), (1,21,16,36,11,31,6,26)(2,22,17,37,12,32,7,27)(3,23,18,38,13,33,8,28)(4,24,19,39,14,34,9,29)(5,25,20,40,15,35,10,30)(41,79,46,64,51,69,56,74)(42,80,47,65,52,70,57,75)(43,61,48,66,53,71,58,76)(44,62,49,67,54,72,59,77)(45,63,50,68,55,73,60,78)>;
G:=Group( (1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20)(21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40)(41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60)(61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80), (1,48,16,43,11,58,6,53)(2,45,5,56,12,55,15,46)(3,42,14,49,13,52,4,59)(7,50,10,41,17,60,20,51)(8,47,19,54,18,57,9,44)(21,71,26,76,31,61,36,66)(22,68,35,69,32,78,25,79)(23,65,24,62,33,75,34,72)(27,73,40,74,37,63,30,64)(28,70,29,67,38,80,39,77), (1,21,16,36,11,31,6,26)(2,22,17,37,12,32,7,27)(3,23,18,38,13,33,8,28)(4,24,19,39,14,34,9,29)(5,25,20,40,15,35,10,30)(41,79,46,64,51,69,56,74)(42,80,47,65,52,70,57,75)(43,61,48,66,53,71,58,76)(44,62,49,67,54,72,59,77)(45,63,50,68,55,73,60,78) );
G=PermutationGroup([[(1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20),(21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40),(41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60),(61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80)], [(1,48,16,43,11,58,6,53),(2,45,5,56,12,55,15,46),(3,42,14,49,13,52,4,59),(7,50,10,41,17,60,20,51),(8,47,19,54,18,57,9,44),(21,71,26,76,31,61,36,66),(22,68,35,69,32,78,25,79),(23,65,24,62,33,75,34,72),(27,73,40,74,37,63,30,64),(28,70,29,67,38,80,39,77)], [(1,21,16,36,11,31,6,26),(2,22,17,37,12,32,7,27),(3,23,18,38,13,33,8,28),(4,24,19,39,14,34,9,29),(5,25,20,40,15,35,10,30),(41,79,46,64,51,69,56,74),(42,80,47,65,52,70,57,75),(43,61,48,66,53,71,58,76),(44,62,49,67,54,72,59,77),(45,63,50,68,55,73,60,78)]])
38 conjugacy classes
| class | 1 | 2A | 2B | 2C | 2D | 4A | 4B | 4C | 4D | 4E | 5 | 8A | 8B | 8C | ··· | 8L | 10A | 10B | 10C | 20A | 20B | 20C | 20D | 40A | ··· | 40H |
| order | 1 | 2 | 2 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 5 | 8 | 8 | 8 | ··· | 8 | 10 | 10 | 10 | 20 | 20 | 20 | 20 | 40 | ··· | 40 |
| size | 1 | 1 | 2 | 10 | 10 | 1 | 1 | 2 | 10 | 10 | 4 | 4 | 4 | 20 | ··· | 20 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | ··· | 4 |
38 irreducible representations
| dim | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
| type | + | + | + | + | + | - | + | + | + | |||||||
| image | C1 | C2 | C2 | C4 | C4 | C4 | D4 | D4 | Q8 | F5 | C2xF5 | C4.10C42 | C4xF5 | C22:F5 | C4:F5 | C20.25C42 |
| kernel | C20.25C42 | C2xC8:D5 | D5:M4(2) | C2xC5:2C8 | C2xC40 | D5:C8 | C4xD5 | C2xDic5 | C22xD5 | C2xC8 | C2xC4 | C5 | C4 | C4 | C22 | C1 |
| # reps | 1 | 1 | 2 | 2 | 2 | 8 | 2 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 8 |
Matrix representation of C20.25C42 ►in GL4(F41) generated by
| 13 | 32 | 0 | 0 |
| 9 | 0 | 0 | 0 |
| 0 | 26 | 28 | 28 |
| 26 | 40 | 13 | 32 |
| 38 | 34 | 39 | 0 |
| 14 | 31 | 0 | 39 |
| 1 | 25 | 3 | 7 |
| 18 | 17 | 27 | 10 |
| 6 | 39 | 0 | 0 |
| 2 | 35 | 0 | 0 |
| 27 | 0 | 13 | 23 |
| 27 | 14 | 18 | 28 |
G:=sub<GL(4,GF(41))| [13,9,0,26,32,0,26,40,0,0,28,13,0,0,28,32],[38,14,1,18,34,31,25,17,39,0,3,27,0,39,7,10],[6,2,27,27,39,35,0,14,0,0,13,18,0,0,23,28] >;
C20.25C42 in GAP, Magma, Sage, TeX
C_{20}._{25}C_4^2 % in TeX
G:=Group("C20.25C4^2"); // GroupNames label
G:=SmallGroup(320,235);
// by ID
G=gap.SmallGroup(320,235);
# by ID
G:=PCGroup([7,-2,-2,-2,-2,-2,-2,-5,28,253,64,387,184,1123,136,102,6278,3156]);
// Polycyclic
G:=Group<a,b,c|a^20=1,b^4=c^4=a^10,b*a*b^-1=a^13,a*c=c*a,c*b*c^-1=a^5*b>;
// generators/relations