Elliptic functions and equations of modular curves
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Let $p\ge 5$ be a prime. We show that the space of weight one Eisenstein series defines an embedding into $\PP^{(p-3)/2}$ of the modular curve $X_1(p)$ for the congruence group $Γ_1(p)$ that is scheme-theoretically cut out by explicit quadratic equations.
AMS-LaTeX, 15 pages
AMS-LaTeX, 15 pages