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Questions about modular forms and related areas

4 votes
Accepted

Modular forms and Period Polynomials

I don't know much about weakly holomorphic modular forms, so what follows is only about holomorphic modular forms. The answer to question 2 is just that this follows from the definition of the period …
Emmanuel Lecouturier's user avatar
7 votes
1 answer
778 views

Special fiber of the Néron model of the generalized Jacobian of a singular curve

Let $C$ be a curve over $\mathbf{Q}_p$ (or a finite extension) whose minimal regular model $\mathcal{C}$ over $\mathbf{Z}_p$ has a "nice" special fiber (maybe singular, with at most ordinary double si …
Emmanuel Lecouturier's user avatar
7 votes
1 answer
499 views

Smallest Mazur's good prime

Let $p$ and $\ell$ be primes $\geq 5$ such that $\ell$ divides $p-1$. Following Mazur, we say that a prime $q$ is a $\textit{good prime}$ if $\ell$ does not divide $q-1$ and $q$ is not a $\ell$th powe …
Emmanuel Lecouturier's user avatar
7 votes
0 answers
419 views

Moduli interpretation of Eisenstein series

Let $N \geq 11$ be an integer and consider the basis of Eisenstein series for $M_2(\Gamma_0(N))$ described in Theorem $4.6.2$ of Diamond--Shurman's book. Pick and Eisenstein series $F$ in this basis. …
Emmanuel Lecouturier's user avatar
17 votes
1 answer
737 views

Special fiber of $X(p)$ in characteristic $p$

Let $p \geq 5$ be a prime. Let $Y(p)$ be the fine moduli space representing elliptic curves + basis of the $p$-torsion over $\mathbb{Q}_p$ and let $Y_0(p)$ be the fine moduli space representing ellipt …
Emmanuel Lecouturier's user avatar