Defining parameters
Level: | \( N \) | \(=\) | \( 18 = 2 \cdot 3^{2} \) |
Weight: | \( k \) | \(=\) | \( 6 \) |
Character orbit: | \([\chi]\) | \(=\) | 18.c (of order \(3\) and degree \(2\)) |
Character conductor: | \(\operatorname{cond}(\chi)\) | \(=\) | \( 9 \) |
Character field: | \(\Q(\zeta_{3})\) | ||
Newform subspaces: | \( 2 \) | ||
Sturm bound: | \(18\) | ||
Trace bound: | \(1\) | ||
Distinguishing \(T_p\): | \(5\) |
Dimensions
The following table gives the dimensions of various subspaces of \(M_{6}(18, [\chi])\).
Total | New | Old | |
---|---|---|---|
Modular forms | 34 | 10 | 24 |
Cusp forms | 26 | 10 | 16 |
Eisenstein series | 8 | 0 | 8 |
Trace form
Decomposition of \(S_{6}^{\mathrm{new}}(18, [\chi])\) into newform subspaces
Label | Dim | $A$ | Field | CM | Traces | $q$-expansion | |||
---|---|---|---|---|---|---|---|---|---|
$a_{2}$ | $a_{3}$ | $a_{5}$ | $a_{7}$ | ||||||
18.6.c.a | $4$ | $2.887$ | \(\Q(\sqrt{-2}, \sqrt{-3})\) | None | \(8\) | \(0\) | \(-54\) | \(74\) | \(q+4\beta _{1}q^{2}+(-3+6\beta _{1}+\beta _{3})q^{3}+(-2^{4}+\cdots)q^{4}+\cdots\) |
18.6.c.b | $6$ | $2.887$ | 6.0.\(\cdots\).3 | None | \(-12\) | \(9\) | \(-54\) | \(-132\) | \(q-4\beta _{1}q^{2}+(1+\beta _{1}+\beta _{2}-\beta _{3})q^{3}+\cdots\) |
Decomposition of \(S_{6}^{\mathrm{old}}(18, [\chi])\) into lower level spaces
\( S_{6}^{\mathrm{old}}(18, [\chi]) \cong \) \(S_{6}^{\mathrm{new}}(9, [\chi])\)\(^{\oplus 2}\)