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The Normality of Meromorphic Functions with Multiple Zeros and Poles Concerning Sharing Values
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  • Journal title : Kyungpook mathematical journal
  • Volume 55, Issue 3,  2015, pp.641-652
  • Publisher : Department of Mathematics, Kyungpook National University
  • DOI : 10.5666/KMJ.2015.55.3.641
 Title & Authors
The Normality of Meromorphic Functions with Multiple Zeros and Poles Concerning Sharing Values
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In this paper we study the problem of normal families of meromorphic functions concerning shared values. Let F be a family of meromorphic functions in the plane domain and n, k be two positive integers such that , and let a, b be two finite complex constants such that . Suppose that (1) and share b in D for every pair of functions f, ; (2) All zeros of f have multiplicity at least k + 2 and all poles of f have multiplicity at least 2 for each in D; (3) Zeros of are not the b points of f(z) for each in D. Then F is normal in D. And some examples are provided to show the result is sharp.
meromorphic functions;shared value;normal family;
 Cited by
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