ある意味で1つまたは3つの値を共有する有理型函数
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概要
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In this paper we give some unicity theorems for nonconstant meromorphic functions that share one or three values in some sense. Our main results are the following (A) and (B). (A) Let f and g be distinct nonconstant meromorphic functions sharing three values 0, 1, ∞ IM. If [numerical formula] then fg≡1. (B) Let f be a nonconstant meromorphic function and let k be a positive integer. If f and f^<(k)> share 1 IM, and if [numerical formula], then f≡f^<(k)>.
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