A non-uniqueness criterion for the character-automorphic Nehari problem is given. Certain subclass of solutions, connected with "the entropy functional" of the problem, is described. The description yields a character-automorphic counterpart of the Adamyan-Arov-Krein theorem.
Cite this article
Peter Yuditskii, The Character-Automorphic Nehari Problem: Non-Uniqueness Criterion and some Extremal Solutions. Z. Anal. Anwend. 16 (1997), no. 2, pp. 249–261DOI 10.4171/ZAA/762