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A reverse Denjoy theorem II
Authors:P C Fenton  J Rossi
Institution:1.Department of Mathematics and Statisics,University of Otago,Dunedin,New Zealand;2.Department Of Mathematics,Virginia Tech,Blacksburg,USA
Abstract:For α satisfying 0 < α < π, suppose that C 1 and C 2 are rays from the origin, C 1: z = re i(πα) and C 2: z = re i(π+α), r ≥ 0, and that D = {z: | arg zπ| < α}. Let u be a nonconstant subharmonic function in the plane and define B(r, u) = sup|z|=r u(z) and A D (r, u) = $ \inf _{z \in \bar D_r } $ \inf _{z \in \bar D_r } u(z), where D r = {z: zD and |z| = r}. If u(z) = (1 + o(1))B(|z|, u) as z → ∞ on C 1C 2 and A D (r, u) = o(B(r, u)) as r → ∞, then the lower order of u is at least π/(2α).
Keywords:
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