Properties

Label 5.8.b
Level 5
Weight 8
Character orbit b
Rep. character \(\chi_{5}(4,\cdot)\)
Character field \(\Q\)
Dimension 2
Newforms 1
Sturm bound 4
Trace bound 0

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Defining parameters

Level: \( N \) = \( 5 \)
Weight: \( k \) = \( 8 \)
Character orbit: \([\chi]\) = 5.b (of order \(2\) and degree \(1\))
Character conductor: \(\operatorname{cond}(\chi)\) = \( 5 \)
Character field: \(\Q\)
Newforms: \( 1 \)
Sturm bound: \(4\)
Trace bound: \(0\)

Dimensions

The following table gives the dimensions of various subspaces of \(M_{8}(5, [\chi])\).

Total New Old
Modular forms 4 4 0
Cusp forms 2 2 0
Eisenstein series 2 2 0

Trace form

\( 2q + 24q^{4} + 150q^{5} - 696q^{6} + 2286q^{9} + O(q^{10}) \) \( 2q + 24q^{4} + 150q^{5} - 696q^{6} + 2286q^{9} + 5800q^{10} - 13656q^{11} + 9048q^{14} + 17400q^{15} - 29408q^{16} + 13720q^{19} + 1800q^{20} + 27144q^{21} - 97440q^{24} - 133750q^{25} + 218544q^{26} + 51180q^{29} - 52200q^{30} + 164224q^{31} - 337792q^{34} - 226200q^{35} + 27432q^{36} + 655632q^{39} + 812000q^{40} - 1066236q^{41} - 163872q^{44} + 171450q^{45} - 629416q^{46} + 1294214q^{49} + 870000q^{50} - 1013376q^{51} - 2317680q^{54} - 1024200q^{55} + 1266720q^{56} + 2877960q^{59} + 208800q^{60} + 2762044q^{61} - 4510336q^{64} - 5463600q^{65} + 4752288q^{66} - 1888248q^{69} + 678600q^{70} - 963216q^{71} + 4814928q^{74} + 2610000q^{75} + 164640q^{76} - 2119520q^{79} - 2205600q^{80} - 1953558q^{81} + 325728q^{84} + 8444800q^{85} - 15270936q^{86} + 11288340q^{89} + 6629400q^{90} - 8523216q^{91} - 125512q^{94} + 1029000q^{95} - 2238336q^{96} - 15608808q^{99} + O(q^{100}) \)

Decomposition of \(S_{8}^{\mathrm{new}}(5, [\chi])\) into irreducible Hecke orbits

Label Dim. \(A\) Field CM Traces $q$-expansion
\(a_2\) \(a_3\) \(a_5\) \(a_7\)
5.8.b.a \(2\) \(1.562\) \(\Q(\sqrt{-29}) \) None \(0\) \(0\) \(150\) \(0\) \(q+\beta q^{2}+3\beta q^{3}+12q^{4}+(75-5^{2}\beta )q^{5}+\cdots\)