Properties

Label 420.4.bk
Level $420$
Weight $4$
Character orbit 420.bk
Rep. character $\chi_{420}(19,\cdot)$
Character field $\Q(\zeta_{6})$
Dimension $288$
Sturm bound $384$

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Defining parameters

Level: \( N \) \(=\) \( 420 = 2^{2} \cdot 3 \cdot 5 \cdot 7 \)
Weight: \( k \) \(=\) \( 4 \)
Character orbit: \([\chi]\) \(=\) 420.bk (of order \(6\) and degree \(2\))
Character conductor: \(\operatorname{cond}(\chi)\) \(=\) \( 140 \)
Character field: \(\Q(\zeta_{6})\)
Sturm bound: \(384\)

Dimensions

The following table gives the dimensions of various subspaces of \(M_{4}(420, [\chi])\).

Total New Old
Modular forms 592 288 304
Cusp forms 560 288 272
Eisenstein series 32 0 32

Trace form

\( 288 q + 1296 q^{9} - 18 q^{10} - 340 q^{14} + 56 q^{16} - 84 q^{25} + 168 q^{30} + 1170 q^{40} - 1648 q^{44} - 1308 q^{46} + 616 q^{49} + 336 q^{50} - 692 q^{56} - 822 q^{60} - 1296 q^{64} + 2052 q^{66}+ \cdots - 7740 q^{96}+O(q^{100}) \) Copy content Toggle raw display

Decomposition of \(S_{4}^{\mathrm{new}}(420, [\chi])\) into newform subspaces

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

Decomposition of \(S_{4}^{\mathrm{old}}(420, [\chi])\) into lower level spaces

\( S_{4}^{\mathrm{old}}(420, [\chi]) \simeq \) \(S_{4}^{\mathrm{new}}(140, [\chi])\)\(^{\oplus 2}\)