, Volume 134, Issue 3-4, pp 309-342
Date: 12 Oct 2010

Simultaneous nonvanishing of automorphic L-functions at the central point

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Let g be a holomorphic Hecke eigenform and {u j } an orthonormal basis of even Hecke–Maass forms for \({\textup{SL}(2,\mathbb{Z})}\) . Denote L(s, g × u j ) and L(s, u j ) the corresponding L-functions. In this paper, we give an asymptotic formula for the average of \({L(\frac{1}{2},g\times u_j)L(\frac{1}{2},u_j)}\) , from which we derive that there are infinitely many u j ’s such that \({L(\frac{1}{2},g\times u_j)L(\frac{1}{2},u_j)\neq0}\) .