Angular cluster sets and oricyclic cluster sets
Niro Yanagihara · Proceedings of the Japan Academy Series A Mathematical Sciences · 1969
Comm. by Zyoiti SUETUNA, M. I. A., June.I0, 1969) 1.Let G be the unit disk zl <1 and/ be its circumference zl -1.For a point e/', let V-V() be an angle with vertex at { and K--K({) be an inscribed disk at {, that is,