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UNIQUENESS OF MEROMORPHIC FUNCTION WITH ITS LINEAR DIFFERENTIAL POLYNOMIAL SHARING TWO VALUES

  • Received : 2020.07.01
  • Accepted : 2021.04.15
  • Published : 2021.07.31

Abstract

The paper has been devoted to study the uniqueness problem of meromorphic function and its linear differential polynomial sharing two values. We have pointed out gaps in one of the theorem due to [1]. We have further extended the corrected form of Chen-Li-Li's result which in turn extend the an earlier result of [8] in a large extent. In fact, we have subtly use the notion of weighted sharing of values in this particular section of literature which was unexplored till now. A handful number of examples have been provided by us pertinent to different discussions. Specially we have given an example to show that one condition in a theorem can not be dropped.

Keywords

Acknowledgement

The authors wish to thank the referee for his/her valuable suggestions towards the improvement of this paper. The second author is thankful to Council of Scientific and Industrial Research (India) for their financial support under File No: 09/106(0191)/2019-EMR-I.

References

  1. B. Chen, Z. Li, and S. Li, Uniqueness of the meromorphic function sharing two values with its derivatives, Pure Mathematics, 8 (2018), 378-382 (in Chinese). https://doi.org/10.12677/PM.2018.84051
  2. G. Frank and G. Weissenborn, Meromorphe Funktionen, die mit einer ihrer Ableitungen Werte teilen, Complex Variables Theory Appl. 7 (1986), no. 1-3, 33-43. https://doi.org/10.1080/17476938608814184
  3. G. G. Gundersen, Meromorphic functions that share two finite values with their derivative, Pacific J. Math. 105 (1983), no. 2, 299-309. http://projecteuclid.org/euclid.pjm/1102723331 https://doi.org/10.2140/pjm.1983.105.299
  4. W. K. Hayman, Meromorphic Functions, Oxford Mathematical Monographs, Clarendon Press, Oxford, 1964.
  5. I. Lahiri, Value distribution of certain differential polynomials, Int. J. Math. Math. Sci. 28 (2001), no. 2, 83-91. https://doi.org/10.1155/S0161171201011036
  6. I. Lahiri, Weighted value sharing and uniqueness of meromorphic functions, Complex Variables Theory Appl. 46 (2001), no. 3, 241-253. https://doi.org/10.1080/17476930108815411
  7. I. Lahiri, Weighted sharing and uniqueness of meromorphic functions, Nagoya Math. J. 161 (2001), 193-206. https://doi.org/10.1017/S0027763000027215
  8. S. Li, Meromorphic functions sharing two values IM with their derivatives, Results Math. 63 (2013), no. 3-4, 965-971. https://doi.org/10.1007/s00025-012-0246-x
  9. P. Li and C.-C. Yang, When an entire function and its linear differential polynomial share two values, Illinois J. Math. 44 (2000), no. 2, 349-362. http://projecteuclid.org/euclid.ijm/1255984845 https://doi.org/10.1215/ijm/1255984845
  10. E. Mues and N. Steinmetz, Meromorphe Funktionen, die mit ihrer Ableitung Werte teilen, Manuscripta Math. 29 (1979), no. 2-4, 195-206. https://doi.org/10.1007/BF01303627
  11. E. Mues and N. Steinmetz, Meromorphe Funktionen, die mit ihrer Ableitung zwei Werte teilen, Results Math. 6 (1983), no. 1, 48-55. https://doi.org/10.1007/BF03323323
  12. L. A. Rubel and C. C. Yang, Values shared by an entire function and its derivative, in Complex analysis (Proc. Conf., Univ. Kentucky, Lexington, Ky., 1976), 101-103. Lecture Notes in Math., 599, Springer, Berlin, 1977.
  13. S. Tanaiadchawoot, Functions that share two finite values with their derivative, Thai J. Math. 4 (2006), no. 2, 383-388.