Abstract
A Blaschke product has no radial limits on a subset E of the unit circle T but has unrestricted limit at each point of T \ E if and only if E is a closed set of measure zero.
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The first author was supported by Simons Foundation (Grant No. 430329).
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Danielyan, A.A., Pasias, S. On a boundary property of Blaschke products. Anal Math 49, 403–408 (2023). https://doi.org/10.1007/s10476-023-0212-8
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DOI: https://doi.org/10.1007/s10476-023-0212-8