DOI QR코드

DOI QR Code

AN EXTENSION OF THE WHITTAKER FUNCTION

  • Choi, Junesang (Department of Mathematics Dongguk University) ;
  • Nisar, Kottakkaran Sooppy (Department of Mathematics College of Arts and Science-Wadi Aldawaser, 11991 Prince Sattam bin Abdulaziz University) ;
  • Rahman, Gauhar (Department of Mathematics and Statistics Hazara University)
  • Received : 2020.08.19
  • Accepted : 2021.10.28
  • Published : 2021.10.31

Abstract

The Whittaker function and its diverse extensions have been actively investigated. Here we aim to introduce an extension of the Whittaker function by using the known extended confluent hypergeometric function 𝚽p,v and investigate some of its formulas such as integral representations, a transformation formula, Mellin transform, and a differential formula. Some special cases of our results are also considered.

Keywords

Acknowledgement

The authors would like express their deep-felt thanks for the reviewer's favorable and constructive comments. The first-named author was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (NRF-2020R111A1A01052440).

References

  1. M. A. Chaudhry, A. Qadir, M. Rafique, and S. M. Zubair, Extension of Euler's beta function, J. Comput. Appl. Math. 78 (1997), no. 1, 19-32. https://doi.org/10.1016/S0377-0427(96)00102-1
  2. M. A. Chaudhry, A. Qadir, H. M. Srivastava, and R. B. Paris, Extended hypergeometric and confluent hypergeometric functions, Appl. Math. Comput. 159 (2004), no. 2, 589-602. https://doi.org/10.1016/j.amc.2003.09.017
  3. J. Choi, A. K. Rathie, and R. K. Parmar, Extension of extended beta, hypergeometric and confluent hypergeometric functions, Honam Math. J. 36 (2014), no. 2, 357-385. https://doi.org/10.5831/HMJ.2014.36.2.357
  4. D. K. Nagar, R. A. M. Vasquez, and A. K. Gupta, Properties of the extended Whittaker function, Progr. Appl. Math. 6 (2013), no. 2, 70-80.
  5. F. W. J. Olver, D. W. Lozier, R. F. Boisvert, and C. W. Clark, NIST handbook of mathematical functions, U.S. Department of Commerce, National Institute of Standards and Technology, Washington, DC, 2010.
  6. R. K. Parmar, P. Chopra, and R. B. Paris, On an extension of extended beta and hypergeometric functions, J. Class. Anal. 11 (2017), no. 2, 91-106. https://doi.org/10.7153/jca-2017-11-07
  7. G. Rahman, S. Mubeen, K. S, Nisar, and J. Choi, (p, q)-Whittaker function and associated properties and formulas, arXiv:1710.07196 [math.CA], 2017.
  8. E. D. Rainville, Special Functions, The Macmillan Co., New York, 1960.
  9. H. M. Srivastava and J. Choi, Zeta and q-Zeta Functions and Associated Series and Integrals, Elsevier, Inc., Amsterdam, 2012. https://doi.org/10.1016/B978-0-12-385218-2.00001-3
  10. H. M. Srivastava and H. L. Manocha, A Treatise on Generating Functions, Ellis Horwood Series: Mathematics and its Applications, Ellis Horwood Ltd., Chichester, 1984.
  11. E. T. Whittaker, An expression of certain known functions as generalized hypergeometric functions, Bull. Amer. Math. Soc. 10 (1903), no. 3, 125-134. https://doi.org/10.1090/S0002-9904-1903-01077-5
  12. E. T. Whittaker and G. N. Watson, A course of modern analysis. An introduction to the general theory of infinite processes and of analytic functions: with an account of the principal transcendental functions, Fourth edition. Reprinted, Cambridge University Press, New York, 1962.