-harmonic measure is not additive on null sets
José G. Llorente, Juan J. Manfredi, Jang-Mei Wu (2005)
Annali della Scuola Normale Superiore di Pisa - Classe di Scienze
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When and the -harmonic measure on the boundary of the half plane is not additive on null sets. In fact, there are finitely many sets , ,..., in , of -harmonic measure zero, such that .