Let $N \ge 1$. The curve $X_{\text{ns}}^{+}(N)$ is the modular curve $X(\Gamma_{\text{ns}}^{+}(N))$ where $\Gamma_{\text{ns}}^{+}(N)$ is the normalizer of the non-split Cartan subgroup $\Gamma_{\text{ns}}(N)$.
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- Last edited by Andrew Sutherland on 2022-03-24 20:06:06
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- 2022-03-24 20:06:06 by Andrew Sutherland
- 2022-03-24 16:45:01 by Bjorn Poonen
- 2020-10-29 12:33:59 by Eran Assaf
- 2020-10-29 11:50:59 by Eran Assaf