Overview
Input: a modular form f ∈ S2(Γ1(N)) such that Λf is a lattice in C.
We always assume f =
P
σ cσFσ
where F is a newform in S2(Γ1(N)),
{Fσ
} are the Galois conjugates of f , and cσ ∈ Q.
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