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Petersson norms and liftings of Hilbert modular forms

โœ Scribed by Dominic Lanphier


Publisher
Elsevier Science
Year
2004
Tongue
English
Weight
321 KB
Volume
106
Category
Article
ISSN
0022-314X

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โœฆ Synopsis


We prove the algebraicity of the ratio of the Petersson norm of a holomorphic Hilbert modular form over a totally real number field and the norm of its Saito-Kurokawa lift. We prove a similar result for the Ikeda lift of an elliptic modular form. In order to obtain these we combine some results on local symplectic groups to generalize a special value of the standard L-function attached to a Siegel-Hilbert cuspform.


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In a previous paper the second author proved that the image of the Galois representation modulo attached to a Hilbert modular newform is "large" for all but finitely many primes , if the newform is not a theta series. In this brief note, we give an explicit bound for this exceptional finite set of p