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Determination of cusp forms on GL(2) by coefficients restricted to quadratic subfields (with an appendix by Dipendra Prasad and Dinakar Ramakrishnan)
Journal article   Open access   Peer reviewed

Determination of cusp forms on GL(2) by coefficients restricted to quadratic subfields (with an appendix by Dipendra Prasad and Dinakar Ramakrishnan)

M Krishnamurthy
Journal of number theory, Vol.132(6), pp.1359-1384
06/2012
DOI: 10.1016/j.jnt.2011.09.014
url
https://doi.org/10.1016/j.jnt.2011.09.014View
Published (Version of record) Open Access

Abstract

Given E/F a quadratic extension of number fields and a cuspidal representation π of GL2(AE), we give a full description of the fibers of the Asai transfer of π. We then determine the extent to which Fourier coefficients defined by integral ideals of F determine the representation π.
Automorphic forms Functoriality L-functions

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