Skip to main content
Log in

Modular identities and dissections of continued fractions of order thirty-two

  • Original Article
  • Published:
São Paulo Journal of Mathematical Sciences Aims and scope Submit manuscript

Abstract

In this paper, we derive four continued fractions of order 32 as special cases of a general continued fraction identity recorded by Ramanujan. We prove theta-function representations and establish a modular relation connecting the four continued fractions. We also prove 2-, 4-, 8-, and 16-dissections for a continued fraction and show that the sign of the coefficients in the power series expansion of a continued fraction and its reciprocal are periodic with period 32. The results are analogous to those of the famous Rogers-Ramanujan continued fraction.

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. Adiga, C., Berndt, B.C., Bhargava , S., Watson, G.N.: Chapter 16 of Ramanujan’s second notebook: Theta function and q-series. Mem. Am. Math. Soc. 315 1–91 (1985)

  2. Adiga, C., Surekha, M.S., Vanitha, A.: On some modular relations and 2- and 4-dissections of Ramanujan’s continued fraction of order six. Indian J. Math. 57(2), 199–216 (2015)

  3. Andrews, G.E.: Ramanujan’s Lost Notebook III, The Rogers-Ramanujan continued fraction. Adv. Math. 41, 186–208 (1981)

  4. Berndt, B.C.: Ramanujan’s Notebooks. Part III, Springer, New York (1991)

  5. Hirschhorn, M.D.: On the expanssion of continued fraction. Ramanujan J. 2, 521–527 (1998)

    Article  MathSciNet  MATH  Google Scholar 

  6. Lewis, R.P., Liu, Z.G.: A conjecture of Hirschhorn on the 4-dissection of Ramanujan’s continued fraction. Ramanujan J. 2, 347–352 (2000)

  7. Lin, B.L.S.: On the expansion of continued fraction of order twelve. Int. J. Number Thy. 9(8), 2019–2031 (2013)

    Article  MathSciNet  MATH  Google Scholar 

  8. Ramanujan, S.: Collected papers, Cambridge University Press, Cambridge, 1927; repriented by Chelsea, New York, 1962; repriented by the American Mathematical Society. Providence, RI (2000)

    Google Scholar 

  9. Ramanujan, S.: The Lost Notebook and other Unpublished Papers. Narosa, New Delhi (1988)

    MATH  Google Scholar 

  10. Richmond, B., Szekeres, G.: The Taylor coefficients of certain infinite products. Acta Sci. Math. 40, 347–369 (1978)

    MathSciNet  MATH  Google Scholar 

  11. Surekha, M.S.: On the modular relations and dissections for a continued fraction of order sixteen. Palestine J. Math. 6, 119–132 (2017)

    MathSciNet  MATH  Google Scholar 

Download references

Acknowledgements

The authors are thankful to the referee for his/her comments which improves the quality of the paper.

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Nipen Saikia.

Ethics declarations

Conflict of interest

The authors declare that there is no conflict of interest regarding the publication of this article.

Human and animal rights

The authors declare that there is no research involving human participants and/or animals in the contained of this paper.

Additional information

Communicated by Julio Andrade.

Publisher's Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Chetry, J., Saikia, N. Modular identities and dissections of continued fractions of order thirty-two. São Paulo J. Math. Sci. 17, 701–719 (2023). https://doi.org/10.1007/s40863-021-00253-0

Download citation

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s40863-021-00253-0

Keywords

Mathematics Subject Classification

Navigation