
doi: 10.1007/bf02808162
Die Arbeit befaßt sich mit Poincaréreihen \(P_ f(g)= \sum_{H\cap \Gamma\setminus\Gamma} f(\gamma g)\) für arithmetische Untergruppen \(\Gamma\) halbeinfacher reeller, über \(\mathbb{Q}\) definierter Gruppen \(G\); dabei ist \(H\) Untergruppe der Fixpunkte einer Involution in \(G\). Der Autor entwickelt Kriterien dafür, wann \(P_ f\) konvergiert und eine Spitzenform darstellt. Anwendbar sind diese Kriterien auf die orthogonale Gruppe gewisser quadratischer Formen vom \(\mathbb{R}\)-Index 1 in 4 und 5 Variablen.
cusp forms, Representation-theoretic methods; automorphic representations over local and global fields, real semisimple groups, group of points fixed by an involution, arithmetic subgroup, Other groups and their modular and automorphic forms (several variables), irreducible representation, Poincaré series, quadratic forms, orthogonal group
cusp forms, Representation-theoretic methods; automorphic representations over local and global fields, real semisimple groups, group of points fixed by an involution, arithmetic subgroup, Other groups and their modular and automorphic forms (several variables), irreducible representation, Poincaré series, quadratic forms, orthogonal group
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