# Relations of rationality for special values of Rankin–Selberg L-functions of GLn×GLm over CM-fields

@article{Grobner2020RelationsOR,
title={Relations of rationality for special values of
Rankin–Selberg L-functions of GLn×GLm over CM-fields},
author={Harald Grobner and Gunja Sachdeva},
journal={Pacific Journal of Mathematics},
year={2020},
volume={308},
pages={281-305}
}
• Published 9 December 2020
• Mathematics
• Pacific Journal of Mathematics
In this paper we present a bridge between automorphic forms of general reductive groups and motives over number elds, hinting a translation of Deligne's conjecture for motivic L-functions into a precise automorphic context. The bulk of this article provides evidence for such an automorphic translation by considering the case of Rankin Selberg L-functions L(s,Π× Π′) of GLn × GLm over CMelds F . Our main results are of two di erent kinds: Firstly, for arbitrary integers 1 ≤ m ≤ n, and suitable…
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