Truncation error bounds of branched continued fraction expansions of special ratios of Horn's hypergeometric functions \(H_4\)

Authors

DOI:

https://doi.org/10.64700/altay.15

Keywords:

hypergeometric function, branched continued fraction, approximation by rational functions, rate of convergence, analytic continuation

Abstract

The paper considers the branched continued fraction extensions of special ratios of Horn's hypergeometric functions \(H_4\) with real parameters and variables. Truncation error bounds are established for such expansions with certain conditions on their coefficients. Some domains of analytical continuation of the above-mentioned special ratios are also established using the PF method (based on the so-called property of fork for approximants of a branched continued fraction).

References

[1] T. Antonova, R. Dmytryshyn, I.-A. Lutsiv and S. Sharyn: On some branched continued fraction expansions for Horn’s hypergeometric function (H_4(a, b; c, d; z_1, z_2)) ratios, Axioms, 12 (3) (2023), Article ID: 299.

[2] T. Antonova, R. Dmytryshyn and S. Sharyn: Branched continued fraction representations of ratios of Horn’s confluent function H6, Constr. Math. Anal., 6 (1) (2023), 22–37.

[3] T. Antonova: On structure of branched continued fractions, Carpathian Math. Publ., 16 (2) (2024), 391–400.

[4] D. I. Bodnar: Branched Continued Fractions, Naukova Dumka, Kyiv (1986).

[5] Y. A. Brychkov, N. V. Savischenko: On some formulas for the Horn functions (H_4(a, b; c, c′; w, z)) and (H^{(c)}_7 (a; c, c′;w, z)), Integral Transforms Spec. Funct., 32 (2) (2021), 969–987.

[6] J. Choi:Recent advances in special functions and their applications, Symmetry, 15 (12) (2023), Article ID: 2159.

[7] R. Dmytryshyn, T. Antonova and S. Hladun:On analytical continuation of the Horn’s hypergeometric functions (H_3) and their ratios, Axioms,14 (1) (2025), Article ID: 67.

[8] R. Dmytryshyn, C. Cesarano, M. Dmytryshyn and I.-A. Lutsiv: A priori bounds for truncation error of branched continued fraction expansions of Horn’s hypergeometric functions H4 and their ratios, Res. Math., 33 (1) (2025), 13–22.

[9] R. Dmytryshyn, C. Cesarano, I.-A. Lutsiv and M. Dmytryshyn: Numerical stability of the branched continued fraction expansion of Horn’s hypergeometric function (H_4), Mat. Stud., 61 (1) (2024), 51–60.

[10] R. Dmytryshyn, I.-A. Lutsiv and O. Bodnar: On the domains of convergence of the branched continued fraction expansion of ratio (H_4(a, d + 1; c, d; z)/H4(a, d + 2; c, d + 1; z)), Res. Math., 31 (2) (2023), 19–26.

[11] R. Dmytryshyn, I.-A. Lutsiv, M. Dmytryshyn and C. Cesarano,: On some domains of convergence of branched continued fraction expansions of the ratios of Horn hypergeometric functions (H_4), Ukrainian Math. J., 76 (4) (2024), 559–565.

[12] R. Dmytryshyn, I.-A. Lutsiv and M. Dmytryshyn: On the analytic extension of the Horn’s hypergeometric function H4, Carpathian Math. Publ., 16 (1) (2024), 32–39.

[13] R. Dmytryshyn: On the analytic continuation of Appell’s hypergeometric function F2 to some symmetric domains in the space (C_2), Symmetry, 16 (11) (2024), Article ID: 1480.

[14] R. Dmytryshyn: Truncation error bounds for branched continued fraction expansions of some Appell’s hypergeometric functions (F_2), Symmetry, 17 (8) (2025), Article ID: 1204.

[15] A. Erdélyi, W. Magnus, F. Oberhettinger and F. G. Tricomi: Higher Transcendental Functions, 1, McGraw-Hill Book Co., New York (1953).

[16] H. Exton: Multiple Hypergeometric Functions and Applications, Halsted Press, Chichester (1976).

[17] J. Horn: Hypergeometrische Funktionen zweier Veränderlichen, Math. Ann., 105 (1931), 381–407.

[18] W. B. Jones and W. J. Thron: Continued Fractions: Analytic Theory and Applications, Addison-Wesley Pub. Co., Reading (1980).

[19] M. A. Pathan: On finite series of Horn’s function (H_4), Bull. Inst. Math. Acad. Sinica, 8 (1980), 39–44.

[20] V. Pivovarchik: Recovering the shape of a quantum tree by two spectra, Integr. Equ. Oper. Theory, 96 (2024), 11.

[21] A. Shehata: On basic Horn hypergeometric functions (H_3) and (H_4), Adv. Differ. Equ., 2020 (2020), 595.

[22] X.-J. Yang: Theory and applications of special functions for scientists and engineers, Springer, Singapore (2022).

Downloads

Published

2025-11-07

How to Cite

Dmytryshyn, R., Cesarano, C., & Lutsiv, I.-A. (2025). Truncation error bounds of branched continued fraction expansions of special ratios of Horn’s hypergeometric functions \(H_4\). Altay Conference Proceedings in Mathematics, 2(1), 23–31. https://doi.org/10.64700/altay.15

Issue

Section

Issue: IWMPAOATA

Similar Articles

1 2 > >> 

You may also start an advanced similarity search for this article.