Defining parameters
Level: | \( N \) | = | \( 25 = 5^{2} \) |
Weight: | \( k \) | = | \( 20 \) |
Nonzero newspaces: | \( 4 \) | ||
Sturm bound: | \(1000\) | ||
Trace bound: | \(2\) |
Dimensions
The following table gives the dimensions of various subspaces of \(M_{20}(\Gamma_1(25))\).
Total | New | Old | |
---|---|---|---|
Modular forms | 489 | 449 | 40 |
Cusp forms | 461 | 428 | 33 |
Eisenstein series | 28 | 21 | 7 |
Trace form
Decomposition of \(S_{20}^{\mathrm{new}}(\Gamma_1(25))\)
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 |
---|---|---|---|---|
25.20.a | \(\chi_{25}(1, \cdot)\) | 25.20.a.a | 1 | 1 |
25.20.a.b | 3 | |||
25.20.a.c | 4 | |||
25.20.a.d | 6 | |||
25.20.a.e | 6 | |||
25.20.a.f | 8 | |||
25.20.b | \(\chi_{25}(24, \cdot)\) | 25.20.b.a | 2 | 1 |
25.20.b.b | 6 | |||
25.20.b.c | 8 | |||
25.20.b.d | 12 | |||
25.20.d | \(\chi_{25}(6, \cdot)\) | n/a | 188 | 4 |
25.20.e | \(\chi_{25}(4, \cdot)\) | n/a | 184 | 4 |
"n/a" means that newforms for that character have not been added to the database yet
Decomposition of \(S_{20}^{\mathrm{old}}(\Gamma_1(25))\) into lower level spaces
\( S_{20}^{\mathrm{old}}(\Gamma_1(25)) \cong \) \(S_{20}^{\mathrm{new}}(\Gamma_1(1))\)\(^{\oplus 3}\)\(\oplus\)\(S_{20}^{\mathrm{new}}(\Gamma_1(5))\)\(^{\oplus 2}\)