Defining parameters
Level: | \( N \) | \(=\) | \( 21 = 3 \cdot 7 \) |
Weight: | \( k \) | \(=\) | \( 15 \) |
Character orbit: | \([\chi]\) | \(=\) | 21.h (of order \(6\) and degree \(2\)) |
Character conductor: | \(\operatorname{cond}(\chi)\) | \(=\) | \( 21 \) |
Character field: | \(\Q(\zeta_{6})\) | ||
Newform subspaces: | \( 2 \) | ||
Sturm bound: | \(40\) | ||
Trace bound: | \(1\) | ||
Distinguishing \(T_p\): | \(2\) |
Dimensions
The following table gives the dimensions of various subspaces of \(M_{15}(21, [\chi])\).
Total | New | Old | |
---|---|---|---|
Modular forms | 78 | 78 | 0 |
Cusp forms | 70 | 70 | 0 |
Eisenstein series | 8 | 8 | 0 |
Trace form
Decomposition of \(S_{15}^{\mathrm{new}}(21, [\chi])\) into newform subspaces
Label | Dim | $A$ | Field | CM | Traces | $q$-expansion | |||
---|---|---|---|---|---|---|---|---|---|
$a_{2}$ | $a_{3}$ | $a_{5}$ | $a_{7}$ | ||||||
21.15.h.a | $2$ | $26.109$ | \(\Q(\sqrt{-3}) \) | \(\Q(\sqrt{-3}) \) | \(0\) | \(2187\) | \(0\) | \(1461083\) | \(q+3^{7}\zeta_{6}q^{3}-2^{14}\zeta_{6}q^{4}+(950035+\cdots)q^{7}+\cdots\) |
21.15.h.b | $68$ | $26.109$ | None | \(0\) | \(-2188\) | \(0\) | \(-1262394\) |