Defining parameters
| Level: | \( N \) | = | \( 27 = 3^{3} \) |
| Weight: | \( k \) | = | \( 2 \) |
| Nonzero newspaces: | \( 2 \) | ||
| Newform subspaces: | \( 2 \) | ||
| Sturm bound: | \(108\) | ||
| Trace bound: | \(1\) |
Dimensions
The following table gives the dimensions of various subspaces of \(M_{2}(\Gamma_1(27))\).
| Total | New | Old | |
|---|---|---|---|
| Modular forms | 42 | 29 | 13 |
| Cusp forms | 13 | 13 | 0 |
| Eisenstein series | 29 | 16 | 13 |
Trace form
Decomposition of \(S_{2}^{\mathrm{new}}(\Gamma_1(27))\)
We only show spaces with even parity, since no modular forms exist when this condition is not satisfied. Within each space \( S_k^{\mathrm{new}}(N, \chi) \) we list available newforms together with their dimension.
| Label | \(\chi\) | Newforms | Dimension | \(\chi\) degree |
|---|---|---|---|---|
| 27.2.a | \(\chi_{27}(1, \cdot)\) | 27.2.a.a | 1 | 1 |
| 27.2.c | \(\chi_{27}(10, \cdot)\) | None | 0 | 2 |
| 27.2.e | \(\chi_{27}(4, \cdot)\) | 27.2.e.a | 12 | 6 |