Remarks on Automorphy of Residually Dihedral Representations
Remarks on Automorphy of Residually Dihedral Representations
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发表时间:
2016
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通讯作者:
Sudesh Kalyanswamy
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作者:
Sudesh Kalyanswamy
We prove automorphy lifting results for geometric representations $
ho:G_F
ightarrow GL_2(mathcal{O})$, with $F$ a totally real field, and $mathcal{O}$ the ring of integers of a finite extension of $mathbb{Q}_p$ with $p$ an odd prime, such that the residual representation $ar{
ho}$ is totally odd and induced from a character of the absolute Galois group of the quadratic subfield $K$ of $F(zeta_p)/F$. Such representations fail the Taylor-Wiles hypothesis and the patching techniques to prove automorphy do not work. We apply this to automorphy of elliptic curves $E$ over $F$, when $E$ has no $F$ rational 7-isogeny and such that the image of $G_F$ acting on $E[7]$ normalizes a split Cartan subgroup of $GL_2(mathbb{F}_7)$.