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Normal criterion concerning shared values
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نویسنده
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chen w. ,zhang y. ,zeng j. ,tian h.
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منبع
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journal of applied mathematics - 2012 - دوره : 2012 - شماره : 0
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چکیده
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We study normal criterion of meromorphic functions shared values,we obtain the following. let f be a family of meromorphic functions in a domain d,such that function f∈f has zeros of multiplicity at least 2,there exists nonzero complex numbers bf,cf depending on f satisfying (i) bf/cf is a constant; (ii)min {σ(0,bf),σ(0,cf),σ(bf,cf)≥m} for some m>0; (iii) (1/cf k-1)(f′) k(z)+f(z)≠bf k/cf k-1 or (1/cf k-1)(f′) k(z)+f(z)=bf k/cf k-1f(z)=bf,then f is normal. these results improve some earlier previous results. © 2012 wei chen et al.
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آدرس
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school of mathematical sciences,xinjiang normal university,xinjiang, China, school of mathematical sciences,xinjiang normal university,xinjiang, China, school of mathematical sciences,xiamen university,xiamen, China, school of mathematical sciences,xinjiang normal university,xinjiang, China
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Authors
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