Defining parameters
| Level: | \( N \) | \(=\) | \( 1620 = 2^{2} \cdot 3^{4} \cdot 5 \) |
| Weight: | \( k \) | \(=\) | \( 4 \) |
| Character orbit: | \([\chi]\) | \(=\) | 1620.br (of order \(54\) and degree \(18\)) |
| Character conductor: | \(\operatorname{cond}(\chi)\) | \(=\) | \( 405 \) |
| Character field: | \(\Q(\zeta_{54})\) | ||
| Sturm bound: | \(1296\) |
Dimensions
The following table gives the dimensions of various subspaces of \(M_{4}(1620, [\chi])\).
| Total | New | Old | |
|---|---|---|---|
| Modular forms | 17604 | 2916 | 14688 |
| Cusp forms | 17388 | 2916 | 14472 |
| Eisenstein series | 216 | 0 | 216 |
Trace form
Decomposition of \(S_{4}^{\mathrm{new}}(1620, [\chi])\) into newform subspaces
The newforms in this space have not yet been added to the LMFDB.
Decomposition of \(S_{4}^{\mathrm{old}}(1620, [\chi])\) into lower level spaces
\( S_{4}^{\mathrm{old}}(1620, [\chi]) \cong \) \(S_{4}^{\mathrm{new}}(405, [\chi])\)\(^{\oplus 3}\)\(\oplus\)\(S_{4}^{\mathrm{new}}(810, [\chi])\)\(^{\oplus 2}\)