Relations between cusp forms sharing Hecke eigenvalues

In this paper we consider the question of when the set of Hecke eigenvalues of a cusp form on $GL_n(A_F)$ is contained in the set of Hecke eigenvalues of a cusp form on $GL_m(A_F)$ for $n \leq m$.This question is closely related to a question about finite dimensional representations of an abstract group, which also we consider in this work.

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