Defining parameters
Level: | \( N \) | \(=\) | \( 882 = 2 \cdot 3^{2} \cdot 7^{2} \) |
Weight: | \( k \) | \(=\) | \( 2 \) |
Character orbit: | \([\chi]\) | \(=\) | 882.ba (of order \(21\) and degree \(12\)) |
Character conductor: | \(\operatorname{cond}(\chi)\) | \(=\) | \( 441 \) |
Character field: | \(\Q(\zeta_{21})\) | ||
Newform subspaces: | \( 2 \) | ||
Sturm bound: | \(336\) | ||
Trace bound: | \(2\) | ||
Distinguishing \(T_p\): | \(5\) |
Dimensions
The following table gives the dimensions of various subspaces of \(M_{2}(882, [\chi])\).
Total | New | Old | |
---|---|---|---|
Modular forms | 2064 | 672 | 1392 |
Cusp forms | 1968 | 672 | 1296 |
Eisenstein series | 96 | 0 | 96 |
Trace form
Decomposition of \(S_{2}^{\mathrm{new}}(882, [\chi])\) into newform subspaces
Label | Dim | $A$ | Field | CM | Traces | $q$-expansion | |||
---|---|---|---|---|---|---|---|---|---|
$a_{2}$ | $a_{3}$ | $a_{5}$ | $a_{7}$ | ||||||
882.2.ba.a | $336$ | $7.043$ | None | \(-28\) | \(5\) | \(2\) | \(2\) | ||
882.2.ba.b | $336$ | $7.043$ | None | \(28\) | \(-5\) | \(2\) | \(0\) |
Decomposition of \(S_{2}^{\mathrm{old}}(882, [\chi])\) into lower level spaces
\( S_{2}^{\mathrm{old}}(882, [\chi]) \cong \) \(S_{2}^{\mathrm{new}}(441, [\chi])\)\(^{\oplus 2}\)