direct product, metabelian, supersoluble, monomial
Aliases: C2xC5:D20, C10:2D20, D10:5D10, Dic5:4D10, C102.11C22, (C5xC10):3D4, C5:3(C2xD20), C52:5(C2xD4), C22.11D52, C10:1(C5:D4), (C2xDic5):4D5, (C22xD5):2D5, (C10xDic5):5C2, (C2xC10).15D10, (D5xC10):6C22, (C5xC10).15C23, (C5xDic5):4C22, C10.15(C22xD5), (D5xC2xC10):2C2, C5:1(C2xC5:D4), C2.15(C2xD52), (C22xC5:D5):1C2, (C2xC5:D5):3C22, SmallGroup(400,177)
Series: Derived ►Chief ►Lower central ►Upper central
Generators and relations for C2xC5:D20
G = < a,b,c,d | a2=b5=c20=d2=1, ab=ba, ac=ca, ad=da, cbc-1=dbd=b-1, dcd=c-1 >
Subgroups: 1004 in 140 conjugacy classes, 40 normal (18 characteristic)
C1, C2, C2, C2, C4, C22, C22, C5, C5, C2xC4, D4, C23, D5, C10, C10, C10, C2xD4, Dic5, C20, D10, D10, C2xC10, C2xC10, C52, D20, C2xDic5, C5:D4, C2xC20, C22xD5, C22xD5, C22xC10, C5xD5, C5:D5, C5xC10, C5xC10, C2xD20, C2xC5:D4, C5xDic5, D5xC10, D5xC10, C2xC5:D5, C2xC5:D5, C102, C5:D20, C10xDic5, D5xC2xC10, C22xC5:D5, C2xC5:D20
Quotients: C1, C2, C22, D4, C23, D5, C2xD4, D10, D20, C5:D4, C22xD5, C2xD20, C2xC5:D4, D52, C5:D20, C2xD52, C2xC5:D20
►On 40 points
(1 33)(2 34)(3 35)(4 36)(5 37)(6 38)(7 39)(8 40)(9 21)(10 22)(11 23)(12 24)(13 25)(14 26)(15 27)(16 28)(17 29)(18 30)(19 31)(20 32)
(1 13 5 17 9)(2 10 18 6 14)(3 15 7 19 11)(4 12 20 8 16)(21 33 25 37 29)(22 30 38 26 34)(23 35 27 39 31)(24 32 40 28 36)
(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)
(1 27)(2 26)(3 25)(4 24)(5 23)(6 22)(7 21)(8 40)(9 39)(10 38)(11 37)(12 36)(13 35)(14 34)(15 33)(16 32)(17 31)(18 30)(19 29)(20 28)
G:=sub<Sym(40)| (1,33)(2,34)(3,35)(4,36)(5,37)(6,38)(7,39)(8,40)(9,21)(10,22)(11,23)(12,24)(13,25)(14,26)(15,27)(16,28)(17,29)(18,30)(19,31)(20,32), (1,13,5,17,9)(2,10,18,6,14)(3,15,7,19,11)(4,12,20,8,16)(21,33,25,37,29)(22,30,38,26,34)(23,35,27,39,31)(24,32,40,28,36), (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), (1,27)(2,26)(3,25)(4,24)(5,23)(6,22)(7,21)(8,40)(9,39)(10,38)(11,37)(12,36)(13,35)(14,34)(15,33)(16,32)(17,31)(18,30)(19,29)(20,28)>;
G:=Group( (1,33)(2,34)(3,35)(4,36)(5,37)(6,38)(7,39)(8,40)(9,21)(10,22)(11,23)(12,24)(13,25)(14,26)(15,27)(16,28)(17,29)(18,30)(19,31)(20,32), (1,13,5,17,9)(2,10,18,6,14)(3,15,7,19,11)(4,12,20,8,16)(21,33,25,37,29)(22,30,38,26,34)(23,35,27,39,31)(24,32,40,28,36), (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), (1,27)(2,26)(3,25)(4,24)(5,23)(6,22)(7,21)(8,40)(9,39)(10,38)(11,37)(12,36)(13,35)(14,34)(15,33)(16,32)(17,31)(18,30)(19,29)(20,28) );
G=PermutationGroup([[(1,33),(2,34),(3,35),(4,36),(5,37),(6,38),(7,39),(8,40),(9,21),(10,22),(11,23),(12,24),(13,25),(14,26),(15,27),(16,28),(17,29),(18,30),(19,31),(20,32)], [(1,13,5,17,9),(2,10,18,6,14),(3,15,7,19,11),(4,12,20,8,16),(21,33,25,37,29),(22,30,38,26,34),(23,35,27,39,31),(24,32,40,28,36)], [(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)], [(1,27),(2,26),(3,25),(4,24),(5,23),(6,22),(7,21),(8,40),(9,39),(10,38),(11,37),(12,36),(13,35),(14,34),(15,33),(16,32),(17,31),(18,30),(19,29),(20,28)]])
58 conjugacy classes
| class | 1 | 2A | 2B | 2C | 2D | 2E | 2F | 2G | 4A | 4B | 5A | 5B | 5C | 5D | 5E | 5F | 5G | 5H | 10A | ··· | 10L | 10M | ··· | 10X | 10Y | ··· | 10AF | 20A | ··· | 20H |
| order | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 4 | 4 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 10 | ··· | 10 | 10 | ··· | 10 | 10 | ··· | 10 | 20 | ··· | 20 |
| size | 1 | 1 | 1 | 1 | 10 | 10 | 50 | 50 | 10 | 10 | 2 | 2 | 2 | 2 | 4 | 4 | 4 | 4 | 2 | ··· | 2 | 4 | ··· | 4 | 10 | ··· | 10 | 10 | ··· | 10 |
58 irreducible representations
| dim | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 4 | 4 | 4 |
| type | + | + | + | + | + | + | + | + | + | + | + | + | + | + | + | |
| image | C1 | C2 | C2 | C2 | C2 | D4 | D5 | D5 | D10 | D10 | D10 | D20 | C5:D4 | D52 | C5:D20 | C2xD52 |
| kernel | C2xC5:D20 | C5:D20 | C10xDic5 | D5xC2xC10 | C22xC5:D5 | C5xC10 | C2xDic5 | C22xD5 | Dic5 | D10 | C2xC10 | C10 | C10 | C22 | C2 | C2 |
| # reps | 1 | 4 | 1 | 1 | 1 | 2 | 2 | 2 | 4 | 4 | 4 | 8 | 8 | 4 | 8 | 4 |
Matrix representation of C2xC5:D20 ►in GL6(F41)
| 40 | 0 | 0 | 0 | 0 | 0 |
| 0 | 40 | 0 | 0 | 0 | 0 |
| 0 | 0 | 1 | 0 | 0 | 0 |
| 0 | 0 | 0 | 1 | 0 | 0 |
| 0 | 0 | 0 | 0 | 1 | 0 |
| 0 | 0 | 0 | 0 | 0 | 1 |
| 1 | 0 | 0 | 0 | 0 | 0 |
| 0 | 1 | 0 | 0 | 0 | 0 |
| 0 | 0 | 0 | 40 | 0 | 0 |
| 0 | 0 | 1 | 6 | 0 | 0 |
| 0 | 0 | 0 | 0 | 1 | 0 |
| 0 | 0 | 0 | 0 | 0 | 1 |
| 1 | 25 | 0 | 0 | 0 | 0 |
| 36 | 40 | 0 | 0 | 0 | 0 |
| 0 | 0 | 35 | 23 | 0 | 0 |
| 0 | 0 | 18 | 6 | 0 | 0 |
| 0 | 0 | 0 | 0 | 0 | 40 |
| 0 | 0 | 0 | 0 | 1 | 6 |
| 1 | 0 | 0 | 0 | 0 | 0 |
| 36 | 40 | 0 | 0 | 0 | 0 |
| 0 | 0 | 0 | 40 | 0 | 0 |
| 0 | 0 | 40 | 0 | 0 | 0 |
| 0 | 0 | 0 | 0 | 1 | 6 |
| 0 | 0 | 0 | 0 | 0 | 40 |
G:=sub<GL(6,GF(41))| [40,0,0,0,0,0,0,40,0,0,0,0,0,0,1,0,0,0,0,0,0,1,0,0,0,0,0,0,1,0,0,0,0,0,0,1],[1,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,40,6,0,0,0,0,0,0,1,0,0,0,0,0,0,1],[1,36,0,0,0,0,25,40,0,0,0,0,0,0,35,18,0,0,0,0,23,6,0,0,0,0,0,0,0,1,0,0,0,0,40,6],[1,36,0,0,0,0,0,40,0,0,0,0,0,0,0,40,0,0,0,0,40,0,0,0,0,0,0,0,1,0,0,0,0,0,6,40] >;
C2xC5:D20 in GAP, Magma, Sage, TeX
C_2\times C_5\rtimes D_{20} % in TeX
G:=Group("C2xC5:D20"); // GroupNames label
G:=SmallGroup(400,177);
// by ID
G=gap.SmallGroup(400,177);
# by ID
G:=PCGroup([6,-2,-2,-2,-2,-5,-5,121,55,970,11525]);
// Polycyclic
G:=Group<a,b,c,d|a^2=b^5=c^20=d^2=1,a*b=b*a,a*c=c*a,a*d=d*a,c*b*c^-1=d*b*d=b^-1,d*c*d=c^-1>;
// generators/relations