Defining parameters
Level: | \( N \) | = | \( 820 = 2^{2} \cdot 5 \cdot 41 \) |
Weight: | \( k \) | = | \( 1 \) |
Nonzero newspaces: | \( 9 \) | ||
Newform subspaces: | \( 19 \) | ||
Sturm bound: | \(40320\) | ||
Trace bound: | \(5\) |
Dimensions
The following table gives the dimensions of various subspaces of \(M_{1}(\Gamma_1(820))\).
Total | New | Old | |
---|---|---|---|
Modular forms | 928 | 342 | 586 |
Cusp forms | 128 | 106 | 22 |
Eisenstein series | 800 | 236 | 564 |
The following table gives the dimensions of subspaces with specified projective image type.
\(D_n\) | \(A_4\) | \(S_4\) | \(A_5\) | |
---|---|---|---|---|
Dimension | 106 | 0 | 0 | 0 |
Trace form
Decomposition of \(S_{1}^{\mathrm{new}}(\Gamma_1(820))\)
We only show spaces with odd 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.
Decomposition of \(S_{1}^{\mathrm{old}}(\Gamma_1(820))\) into lower level spaces
\( S_{1}^{\mathrm{old}}(\Gamma_1(820)) \cong \) \(S_{1}^{\mathrm{new}}(\Gamma_1(164))\)\(^{\oplus 2}\)