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Properties

Label 1638.2.ek
Level $1638$
Weight $2$
Character orbit 1638.ek
Rep. character $\chi_{1638}(815,\cdot)$
Character field $\Q(\zeta_{6})$
Dimension $224$
Sturm bound $672$

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Defining parameters

Level: \( N \) \(=\) \( 1638 = 2 \cdot 3^{2} \cdot 7 \cdot 13 \)
Weight: \( k \) \(=\) \( 2 \)
Character orbit: \([\chi]\) \(=\) 1638.ek (of order \(6\) and degree \(2\))
Character conductor: \(\operatorname{cond}(\chi)\) \(=\) \( 819 \)
Character field: \(\Q(\zeta_{6})\)
Sturm bound: \(672\)

Dimensions

The following table gives the dimensions of various subspaces of \(M_{2}(1638, [\chi])\).

Total New Old
Modular forms 688 224 464
Cusp forms 656 224 432
Eisenstein series 32 0 32

Trace form

\( 224 q + 112 q^{4} + 4 q^{7} + 4 q^{9} + O(q^{10}) \) \( 224 q + 112 q^{4} + 4 q^{7} + 4 q^{9} + 24 q^{11} - 6 q^{13} + 12 q^{15} - 112 q^{16} - 12 q^{18} - 8 q^{21} + 12 q^{23} + 224 q^{25} + 24 q^{26} - 18 q^{27} - 4 q^{28} - 10 q^{30} - 6 q^{31} - 12 q^{35} - 4 q^{36} - 4 q^{37} - 10 q^{42} + 2 q^{43} + 24 q^{44} + 18 q^{47} - 4 q^{49} + 12 q^{50} - 14 q^{51} - 6 q^{52} - 12 q^{53} - 4 q^{57} + 18 q^{62} - 4 q^{63} - 224 q^{64} + 12 q^{65} - 24 q^{66} + 28 q^{67} - 12 q^{69} - 12 q^{71} - 12 q^{72} + 18 q^{74} + 48 q^{75} + 12 q^{77} + 12 q^{78} + 10 q^{79} - 16 q^{81} - 16 q^{84} - 24 q^{85} - 24 q^{87} + 60 q^{89} + 18 q^{90} - 18 q^{91} + 12 q^{92} + 16 q^{93} - 6 q^{97} + 12 q^{99} + O(q^{100}) \)

Display 100 coefficients 10 coefficients

Decomposition of \(S_{2}^{\mathrm{new}}(1638, [\chi])\) into newform subspaces

The newforms in this space have not yet been added to the LMFDB.

Decomposition of \(S_{2}^{\mathrm{old}}(1638, [\chi])\) into lower level spaces

\( S_{2}^{\mathrm{old}}(1638, [\chi]) \cong \) \(S_{2}^{\mathrm{new}}(819, [\chi])\)\(^{\oplus 2}\)