Théorie du potentiel, Proc. Colloq. J. Deny, Orsay/France 1983, Lect. Notes Math. 1096, 544-548 (1984).
Let , , , be the Poisson kernel on the unit disk . Then is an eigenfunction for the critical eigenvalue of the hyperbolic Laplacian . In this paper, it is shown that for has a strong convergence property at the boundary; namely, for almost all , tends to as along a “weakly tangential” domain at .
[For the entire collection see Zbl 0543.00004.]