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arXiv math/0311497math.NTmath.AG
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Q曲线上的伽罗瓦表示与广义Fermat方程A^4 + B^2 = C^p

Galois representations attached to Q-curves and the generalized Fermat equation A^4 + B^2 = C^p

Jordan S. Ellenberg

摘要:

证明了虚二次数域K上d次Q曲线E上的mod p伽罗瓦表示是满射的,对所有大于某个常数M_{K,d}的p,如果E在不整除6的素数上有潜在的乘性约化.证明使用Mazur的形式浸入法,结果的Darmon和Merel对非分裂模曲线,和分析论证表明,某些扭曲的模曲线的雅可比矩阵承认与Mordell-Weil秩0。结合作者和Skinner关于Q-曲线模性的一个定理,满射性结果证明了当p >= 211时,广义Fermat方程A^4 + B^2 = C^p没有非平凡的原始解。

英文摘要:

We show that the mod p Galois representations attached to a Q-curve E of degree d over an imaginary quadratic number field K are surjective for all p larger than some constant M_{K,d}, if E has potentially multiplicative reduction at any prime not dividing 6. The proof uses Mazur's formal immersion method, a result of Darmon and Merel on non-split modular curves, and an analytic argument showing that Jacobians of certain twisted modular curves admit quotients with Mordell-Weil rank 0. In combination with a previous theorem of the author and Skinner on modularity of Q-curves, the surjectivity result allows one to show that the generalized Fermat equation A^4 + B^2 = C^p has no nontrivial primitive solutions for p >= 211.

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