Weight Changing Operators for Automorphic Forms on Grassmannians and Differential Properties of Certain Theta Lifts

preprint2020arXivOpen access

Abstract

We define weight changing operators for automorphic forms on Grassmannians, i.e., on orthogonal groups, and investigate their basic properties. We then evaluate their action on theta kernels, and prove that theta lifts of modular forms, in which the theta kernel involves polynomials of a special type, have some interesting differential properties.

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