Skip to main content

Advertisement

Log in

A product approximation of the gamma function

  • Original Paper
  • Published:
Numerical Algorithms Aims and scope Submit manuscript

Abstract

The main object of this paper is to propose a product approximation for the gamma function. The estimates derived here are studied via the theory of completely monotonic functions. Sharp inequalities are stated.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Similar content being viewed by others

References

  1. Abramowitz, M., Stegun, I. A. (eds.): Handbook of Mathematical Functions with Formulas, Graphs, and Mathematical Tables. Applied Mathematics Series 55, National Bureau of Standards, Washington, D.C. 1964. Reprinted by Dover Publications, New York (1972)

  2. Alzer, H.: On some inequalities for the gamma and psi functions. Math. Comput. 66, 373–389 (1997)

    Article  MATH  MathSciNet  Google Scholar 

  3. Erdélyi, A., Magnus, W., Oberhettinger, F., Tricomi, F. G: Higher Transcendental Functions, Vols. I, McGraw-Hill Book Company, New York, Toronto and London, 1953,1953 and (1955)

  4. Mortici, C.: Product approximation via asymptotic integration. Amer. Math. Monthly 117, 434–441 (2010)

    Article  MATH  MathSciNet  Google Scholar 

  5. Mortici, C.: A quicker convergence toward the gamma constant with the logarithm term involving the constant e. Carpathian J. Math. 26, 86–91 (2010)

    MATH  MathSciNet  Google Scholar 

  6. Mortici, C.: A new Stirling series as continued fraction. Numer. Algorithms 56(1), 17–26 (2011)

    Article  MATH  MathSciNet  Google Scholar 

  7. Ramanujan, S.: The Lost Notebook and Other Unpublished Papers Narosa Publishing Company (Springer), New Delhi and Berlin, 1988

  8. Sándor, J., Debnath, L.: On certain inequalities involving the constant e and their applications. J. Math. Anal. Appl. 249, 569–582 (2000)

    Article  MATH  MathSciNet  Google Scholar 

  9. Whittaker, E.T., Watson, G.N.: 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. Cambridge University Press, Cambridge, London and New York (1927)

    MATH  Google Scholar 

  10. Widder, D.V: The laplace transform. Princeton University Press, Princeton (1941)

    Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Cristinel Mortici.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Mortici, C., Srivastava, H.M. A product approximation of the gamma function. Numer Algor 69, 595–610 (2015). https://doi.org/10.1007/s11075-014-9915-z

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s11075-014-9915-z

Keywords

Mathematics Subject Classifications (2010)

Navigation