Defining parameters
Level: | \( N \) | \(=\) | \( 5 \) |
Weight: | \( k \) | \(=\) | \( 18 \) |
Character orbit: | \([\chi]\) | \(=\) | 5.a (trivial) |
Character field: | \(\Q\) | ||
Newform subspaces: | \( 2 \) | ||
Sturm bound: | \(9\) | ||
Trace bound: | \(1\) | ||
Distinguishing \(T_p\): | \(2\) |
Dimensions
The following table gives the dimensions of various subspaces of \(M_{18}(\Gamma_0(5))\).
Total | New | Old | |
---|---|---|---|
Modular forms | 9 | 5 | 4 |
Cusp forms | 7 | 5 | 2 |
Eisenstein series | 2 | 0 | 2 |
The following table gives the dimensions of the cuspidal new subspaces with specified eigenvalues for the Atkin-Lehner operators and the Fricke involution.
\(5\) | Dim |
---|---|
\(+\) | \(2\) |
\(-\) | \(3\) |
Trace form
Decomposition of \(S_{18}^{\mathrm{new}}(\Gamma_0(5))\) into newform subspaces
Label | Dim | $A$ | Field | CM | Traces | A-L signs | $q$-expansion | ||||
---|---|---|---|---|---|---|---|---|---|---|---|
$a_{2}$ | $a_{3}$ | $a_{5}$ | $a_{7}$ | 5 | |||||||
5.18.a.a | $2$ | $9.161$ | \(\Q(\sqrt{39}) \) | None | \(680\) | \(-10980\) | \(-781250\) | \(-22820700\) | $+$ | \(q+(340+\beta )q^{2}+(-5490-52\beta )q^{3}+\cdots\) | |
5.18.a.b | $3$ | $9.161$ | \(\mathbb{Q}[x]/(x^{3} - \cdots)\) | None | \(118\) | \(15944\) | \(1171875\) | \(2139308\) | $-$ | \(q+(39-\beta _{1})q^{2}+(5317+8\beta _{1}+\beta _{2})q^{3}+\cdots\) |
Decomposition of \(S_{18}^{\mathrm{old}}(\Gamma_0(5))\) into lower level spaces
\( S_{18}^{\mathrm{old}}(\Gamma_0(5)) \cong \) \(S_{18}^{\mathrm{new}}(\Gamma_0(1))\)\(^{\oplus 2}\)