Abstract
Two types of evidence are presented for the conjecture that the image of the cubic Shimura correspondence for PGL3 is characterized by the nonvanishing of a certain period. Specifically, if a cusp from occurs in the pullback of the automorphic theta function on SO8 under the adjoint homomorphism PGL3 → SO8, then the cusp form is conjectured to be a Shimura lift.
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Bump, D., Friedberg, S. & Ginzburg, D. On the cubic Shimura lift for PGL3 . Isr. J. Math. 126, 289–307 (2001). https://doi.org/10.1007/BF02784158
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DOI: https://doi.org/10.1007/BF02784158