%0 Journal Article %A Dorian Goldfeld %A Eric Stade %A Michael Woodbury %T An orthogonality relation for $\mathrm {GL}(4, \mathbb R) $ (with an appendix by Bingrong Huang) %J Forum of Mathematics, Sigma %D 2021 %V 9 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.1017/fms.2021.39/ %R 10.1017/fms.2021.39 %G en %F 10_1017_fms_2021_39