DOI QR코드

DOI QR Code

SOME BOUNDS FOR THE ZEROS OF POLYNOMIALS

  • Mahnaz Shafi Chishti (School of Basic and Applied Sciences, Shobhit Institute of Engineering and Technology (Deemed to be University) Meerut) ;
  • Mohammad Ibrahim Mir (Department of Mathematics, University of Kashmir, South Campus) ;
  • Vipin Kumar Tyagi (School of Basic and Applied Sciences, Shobhit Institute of Engineering and Technology (Deemed to be University) Meerut)
  • Received : 2022.10.10
  • Accepted : 2023.01.10
  • Published : 2023.02.28

Abstract

In this paper, we find a bound for all the zeros of a polynomial in terms of its coefficients similar to the bound given by Montel (1932) and Kuneyida (1916) as an improvement of Cauchy's classical theorem. In fact, we use a generalized version of Hölder's inequality for obtaining various interesting bounds for all the zeros of a polynomial as function of their coefficients.

Keywords

Acknowledgement

Authors are highly thankful to the anonymous reviewers and the Editor for their constructive suggestions and for bringing the paper in the present form.

References

  1. M. Fujiwara: Ueber die Wurzeln der Algebraischen Gleichungen. Tohoku Math. J. 8 (1915), 78-85 
  2. S.B. Kelleher: Des Limites des zerosdun Polynome. J. Math. Pure Appl. 2 (1916), 169-171. 
  3. M. Kuniyeda: Note on the roots of algebraic equations. Tohoku Math. J. 9 (1916), 167-173. 
  4. R.D. Carmichael & T.E. Mason: Note on the roots of algebraic equations. Bull. Amer. Math. Soc. 21 (1914), 14-22.  https://doi.org/10.1090/S0002-9904-1914-02563-7
  5. A.L. Cauchy: Exercises de mathematique. in Oeuvres 9 (1829), p.122. 
  6. M. Marden: Geometry of Polynomials. American Mathematical Society, 1949. 
  7. Q.G. Mohammad: On the zeros of polynomial. Amer. Math. Monthly 72 (1965), 35-38.  https://doi.org/10.2307/2312995
  8. Q.G. Mohammad: Location of the zeros of polynomials. Amer. Math. Monthly 74 (1967), 290-292.  https://doi.org/10.2307/2316028
  9. P. Montel: Sur la limite superieure du module des racines dune equation algebrique. C. R. Soc. Sci. Varsovie 24 (1932), 317-326. 
  10. X. Yang: Holder's inequality. Appl. Math. Lett. 16 (2003), 897-903.  https://doi.org/10.1016/S0893-9659(03)90014-0
  11. Z. Rubinstein: Analytical methods in the study of zeros of polynomials. Pacific J. Math. 13 (1963), 237-249.  https://doi.org/10.2140/pjm.1963.13.237
  12. N.A. Rather, I. Dar & A. Iqbal: Generalizations of Enestrom-Kakeya theorem and its extensions to analytic functions. J. Class. Anal. 16 (2020), 37-44.  https://doi.org/10.7153/jca-2020-16-05
  13. N.A. Rather, I. Dar & A. Iqbal: On the regions containing all the zeros of polynomials and related analytic functions. Vest. Saint Petersburg Univ. Math. Mech. Astron. 8 (2021), 331-337.  https://doi.org/10.21638/spbu01.2021.212
  14. N.A Rather, M. Shafi & I. Dar: On the Enestrom-Kakeya theorem. Appl. Math. E-Notes 22 (2022), 660-667.