Whittaker periods, motivic periods, and special values of tensor product L-functions

Harald Grobner, Michael Harris

Let $\mathcal{K}$ be an imaginary quadratic field. Let $\Pi$ and ${\Pi }^{\prime }$ be irreducible generic cohomological automorphic representation of $GL(n)/\mathcal{K}$ and $GL(n-1)/{\mathcal K}…