Base field \(\Q(\sqrt{-17}) \)
Generator \(a\), with minimal polynomial \(x^{2} + 17\); class number \(4\).
Level 21.1
| Norm: | 21 |
| Ideal: | \((21) = \left(3, a + 1\right) \cdot \left(7, a + 2\right) \) |
| Label: | 21.1 |
Modular form spaces
| Weight | 2 |
|---|---|
| Dimension of cuspidal subspace: | 6 |
| Dimension of new cuspidal subspace: | 2 |
Newforms
This space contains the following newforms of dimension 1.
| label | weight | sign | base change | CM |
|---|---|---|---|---|
| 21.1-a | 2 | +1 | no | no |
| 21.1-b | 2 | +1 | no | no |