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Tate Cycles on Abelian Varieties with Complex Multiplication

  • V. Kumar Murty (a1) and Vijay M. Patankar (a2)

Abstract

We consider Tate cycles on an Abelian variety $A$ defined over a sufficiently large number field $K$ and having complexmultiplication. We show that there is an effective bound $C\,=\,C(A,\,K)$ so that to check whether a given cohomology class is a Tate class on $A$ , it suffices to check the action of Frobenius elements at primes $v$ of norm $\le \,C$ . We also show that for a set of primes $v$ of $K$ of density 1, the space of Tate cycles on the special fibre ${{A}_{v}}$ of the Néron model of $A$ is isomorphic to the space of Tate cycles on $A$ itself.

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References

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Tate Cycles on Abelian Varieties with Complex Multiplication

  • V. Kumar Murty (a1) and Vijay M. Patankar (a2)

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