Let $ f(z)=\sum_{n\ge 1}a(n)e(nz)$ , be a newform of CM-type, and let $ \psi_f$ be the associated Hecke character, so that, $ $ f(z)=\sum_{\mathfrak{a}}\psi_f(\mathfrak{a})e(N(\mathfrak{a})z), $ $ and let $ \rho_{\lambda,f}$ be the associated Galois representation. Let $ \frak{p}$ be a prime ideal of the field by which $ f$ has CM. My question: How toRead more