author: ping shun chan

$Invariant Representations of $\mathrm {GSp}(2)$ under Tensor Product with a Quadratic Character$

... AE) via G : T – "T(g) := T(og) for all g € GL(2, AE). • For an automorphic representation T of GL(2, AE), we let T(T) denote the automorphic representation of GL(4, AF) which is obtained from T via automorphic induction (AC. Sec. 3.6) ...