A bound for the "torsion conductor" of a non-CM elliptic curve

Details A bound for the "torsion conductor" of a non-CM elliptic curve A bound for the "torsion conductor" of a non-CM elliptic curve

2007-11-09

arxiv.org/abs/0711.1546v1

Mathematics

Number Theory

9 pages, submitted for publication

Scientific paper

Given a non-CM elliptic curve E over Q, define the ``torsion conductor'' m_E to be the smallest positive integer so that the Galois representation on the torsion of E has image Pi^{-1}(Gal(Q(E[m_E])/Q), where Pi denotes the natural projection GL_2(\hat{Z}) onto GL_2(Z/m_E Z). We show that, uniformly for semi-stable non-CM elliptic curves E over Q, m_E is less than a constant times the 5th power of the conductor of E.

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