Defining parameters
Level: | \( N \) | \(=\) | \( 378 = 2 \cdot 3^{3} \cdot 7 \) |
Weight: | \( k \) | \(=\) | \( 4 \) |
Character orbit: | \([\chi]\) | \(=\) | 378.d (of order \(2\) and degree \(1\)) |
Character conductor: | \(\operatorname{cond}(\chi)\) | \(=\) | \( 21 \) |
Character field: | \(\Q\) | ||
Newform subspaces: | \( 4 \) | ||
Sturm bound: | \(288\) | ||
Trace bound: | \(7\) | ||
Distinguishing \(T_p\): | \(5\) |
Dimensions
The following table gives the dimensions of various subspaces of \(M_{4}(378, [\chi])\).
Total | New | Old | |
---|---|---|---|
Modular forms | 228 | 32 | 196 |
Cusp forms | 204 | 32 | 172 |
Eisenstein series | 24 | 0 | 24 |
Trace form
Decomposition of \(S_{4}^{\mathrm{new}}(378, [\chi])\) into newform subspaces
Label | Dim | $A$ | Field | CM | Traces | $q$-expansion | |||
---|---|---|---|---|---|---|---|---|---|
$a_{2}$ | $a_{3}$ | $a_{5}$ | $a_{7}$ | ||||||
378.4.d.a | $4$ | $22.303$ | \(\Q(\zeta_{12})\) | None | \(0\) | \(0\) | \(0\) | \(14\) | \(q+\zeta_{12}q^{2}-4q^{4}+(-2\zeta_{12}+4\zeta_{12}^{3})q^{5}+\cdots\) |
378.4.d.b | $4$ | $22.303$ | \(\Q(\zeta_{12})\) | None | \(0\) | \(0\) | \(0\) | \(56\) | \(q+2\zeta_{12}q^{2}-4q^{4}+2\zeta_{12}^{3}q^{5}+(14+\cdots)q^{7}+\cdots\) |
378.4.d.c | $12$ | $22.303$ | \(\mathbb{Q}[x]/(x^{12} - \cdots)\) | None | \(0\) | \(0\) | \(0\) | \(-102\) | \(q+\beta _{2}q^{2}-4q^{4}+(\beta _{5}-\beta _{6})q^{5}+(-9+\cdots)q^{7}+\cdots\) |
378.4.d.d | $12$ | $22.303$ | \(\mathbb{Q}[x]/(x^{12} - \cdots)\) | None | \(0\) | \(0\) | \(0\) | \(-24\) | \(q-\beta _{4}q^{2}-4q^{4}-\beta _{6}q^{5}+(-2+\beta _{1}+\cdots)q^{7}+\cdots\) |
Decomposition of \(S_{4}^{\mathrm{old}}(378, [\chi])\) into lower level spaces
\( S_{4}^{\mathrm{old}}(378, [\chi]) \cong \) \(S_{4}^{\mathrm{new}}(21, [\chi])\)\(^{\oplus 6}\)\(\oplus\)\(S_{4}^{\mathrm{new}}(42, [\chi])\)\(^{\oplus 3}\)\(\oplus\)\(S_{4}^{\mathrm{new}}(63, [\chi])\)\(^{\oplus 4}\)\(\oplus\)\(S_{4}^{\mathrm{new}}(126, [\chi])\)\(^{\oplus 2}\)\(\oplus\)\(S_{4}^{\mathrm{new}}(189, [\chi])\)\(^{\oplus 2}\)