CUP PRODUCTS IN AUTOMORPHIC COHOMOLOGY: THE CASE OF Sp4
نویسنده
چکیده
We study limits of discrete series with infinitesimal character zero for Sp4: their n-cohomology and their contribution to “nonclassical” automorphic cohomology of the period domain for Hodge structures of mirror quintic type. As an application, we obtain the first generalization beyond SU(2, 1) of a result of [C1], showing that this cohomology can be reached by cup products of pairs of “classical” automorphic cohomology classes.
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