Defining parameters
Level: | \( N \) | \(=\) | \( 1380 = 2^{2} \cdot 3 \cdot 5 \cdot 23 \) |
Weight: | \( k \) | \(=\) | \( 2 \) |
Character orbit: | \([\chi]\) | \(=\) | 1380.r (of order \(4\) and degree \(2\)) |
Character conductor: | \(\operatorname{cond}(\chi)\) | \(=\) | \( 15 \) |
Character field: | \(\Q(i)\) | ||
Newform subspaces: | \( 3 \) | ||
Sturm bound: | \(576\) | ||
Trace bound: | \(7\) | ||
Distinguishing \(T_p\): | \(7\) |
Dimensions
The following table gives the dimensions of various subspaces of \(M_{2}(1380, [\chi])\).
Total | New | Old | |
---|---|---|---|
Modular forms | 600 | 88 | 512 |
Cusp forms | 552 | 88 | 464 |
Eisenstein series | 48 | 0 | 48 |
Trace form
Decomposition of \(S_{2}^{\mathrm{new}}(1380, [\chi])\) into newform subspaces
Label | Dim | $A$ | Field | CM | Traces | $q$-expansion | |||
---|---|---|---|---|---|---|---|---|---|
$a_{2}$ | $a_{3}$ | $a_{5}$ | $a_{7}$ | ||||||
1380.2.r.a | $4$ | $11.019$ | \(\Q(\zeta_{8})\) | None | \(0\) | \(-4\) | \(0\) | \(-4\) | \(q+(-1-\zeta_{8}^{2}+\zeta_{8}^{3})q^{3}+(-2\zeta_{8}+\zeta_{8}^{3})q^{5}+\cdots\) |
1380.2.r.b | $4$ | $11.019$ | \(\Q(\zeta_{8})\) | None | \(0\) | \(-4\) | \(0\) | \(12\) | \(q+(-1-\zeta_{8}^{2}+\zeta_{8}^{3})q^{3}+(-\zeta_{8}+2\zeta_{8}^{3})q^{5}+\cdots\) |
1380.2.r.c | $80$ | $11.019$ | None | \(0\) | \(8\) | \(0\) | \(0\) |
Decomposition of \(S_{2}^{\mathrm{old}}(1380, [\chi])\) into lower level spaces
\( S_{2}^{\mathrm{old}}(1380, [\chi]) \cong \) \(S_{2}^{\mathrm{new}}(30, [\chi])\)\(^{\oplus 4}\)\(\oplus\)\(S_{2}^{\mathrm{new}}(60, [\chi])\)\(^{\oplus 2}\)\(\oplus\)\(S_{2}^{\mathrm{new}}(345, [\chi])\)\(^{\oplus 3}\)\(\oplus\)\(S_{2}^{\mathrm{new}}(690, [\chi])\)\(^{\oplus 2}\)