摘要: Let F be a family of mermorphic functions in a domain D, and let a, b, c be complex numbers, a ≠ b. If for each f ∈F, the zeros of f-c are of multiplicity ≥ k+1, and Ef(k)(a) ∈Ef(a), Ef(k)(b) ∈ Ef(b), then F is normal in D.
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韩明华; 顾永兴. THE NORMAL FAMILITY OF MERMORPHIC FUNCTIONS[J]. 数学物理学报(英文版), 2008, 28(4): 759-762.
Han Minghua; Gu Yongxing. THE NORMAL FAMILITY OF MERMORPHIC FUNCTIONS[J]. Acta mathematica scientia,Series B, 2008, 28(4): 759-762.