In this paper, we obtain the following normal criterion: Let F be a family of mero-morphic functions in domain D belong to C, all of whose zeros have multiplicity k + 1 at least. If there exist holomorphic functio...In this paper, we obtain the following normal criterion: Let F be a family of mero-morphic functions in domain D belong to C, all of whose zeros have multiplicity k + 1 at least. If there exist holomorphic functions α(z) not vanishing on D, such that for every function f(z) ∈F, f(z) shares α(z) IM with L(f) on D, then F is normal on D, where L(f) is linear differential polynomials of f(z) with holomorphic coefficients, and k is some positive numbers. We also proved coressponding results on normal functions.展开更多
基金the"11.5"Research & Study Programe of SWUST(No.06zx2116)
文摘In this paper, we obtain the following normal criterion: Let F be a family of mero-morphic functions in domain D belong to C, all of whose zeros have multiplicity k + 1 at least. If there exist holomorphic functions α(z) not vanishing on D, such that for every function f(z) ∈F, f(z) shares α(z) IM with L(f) on D, then F is normal on D, where L(f) is linear differential polynomials of f(z) with holomorphic coefficients, and k is some positive numbers. We also proved coressponding results on normal functions.