Non-Archimedean Smale Mean Value and Dubinin–Sugawa Dual Mean Value Problems

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Contributed by K. MAHESH KRISHNA ↗

Version 1 / Oct 22, 2026 / CC BY 4.0

Abstract

Motivated by the Smale mean value and the Dubinin–Sugawa dual mean value theorems, we formulate non-Archimedean Smale mean value and Dubinin–Sugawa dual mean value problems. We show that if a universal constant satisfying the non-Archimedean Smale mean value problem exists, it must be greater than or equal to one and if a universal constant satisfying the non-Archimedean Dubinin–Sugawa dual mean value problem exists, it must be less than or equal to one. We also derive other bounds whenever roots of unity exist in a non-Archimedean field.

References

  1. Vladimir V. Andrievskii and Stephan Ruscheweyh. Complex polynomials and maximal ranges: background and applications , volume 430 of Math. Appl. Kluwer Acad. Publ., Dordrecht, 1998.
  2. A. F. Beardon, D. Minda, and T. W. Ng. Smale's mean value conjecture and the hyperbolic metric. Math. Ann. , 322(4):623--632, 2002.
  3. Anthony Conte, Ege Fujikawa, and Nikola Lakic. Smale's mean value conjecture and the coefficients of univalent functions. Proc. Amer. Math. Soc. , 135(10):3295--3300, 2007.
  4. Edward Crane. Extremal polynomials in S male's mean value conjecture. Comput. Methods Funct. Theory , 6(1):145--163, 2006.
  5. Edward Crane. A bound for S male's mean value conjecture for complex polynomials. Bull. Lond. Math. Soc. , 39(5):781--791, 2007.
  6. Dimitar K. Dimitrov. Smale's conjecture on mean values of polynomials and electrostatics. Serdica Math. J. , 33(4):399--410, 2007.
  7. V. N. Dubinin. Methods of geometric function theory in classical and modern problems for polynomials. Uspekhi Mat. Nauk , 67(4(406)):3--88, 2012.
  8. V. N. Dubinin. On the dual mean-value conjecture for complex polynomials. Math. Notes , 106:133--135, 2019.
  9. Vladimir Dubinin and Toshiyuki Sugawa. Dual mean value problem for complex polynomials. Proc. Japan Acad. Ser. A Math. Sci. , 85(9):135--137, 2009.
  10. V.N. Dubinin. Inequalities for critical values of polynomials. Sbornik: Mathematics , 197(8):1167--1176, 2006.
Show all 33 referencesShow fewer references
  1. Ege Fujikawa and Toshiyuki Sugawa. Geometric function theory and S male's mean value conjecture. Proc. Japan Acad. Ser. A Math. Sci. , 82(7):97--100, 2006.
  2. Aimo Hinkkanen and Ilgiz Kayumov. On critical values of polynomials with real critical points. Constr. Approx. , 32(2):385--392, 2010.
  3. Aimo Hinkkanen and Ilgiz Kayumov. Smale's problem for critical points on certain two rays. J. Aust. Math. Soc. , 88(2):183--191, 2010.
  4. Aimo Hinkkanen, Ilgiz R. Kayumov, and Diana M. Khammatova. Dual S male's mean value conjecture. Proc. Amer. Math. Soc. , 147(12):5227--5237, 2019.
  5. Aimo Hinkkanen, Ilgiz R. Kayumov, and Diana M. Khammatova. Dual Smale 's mean value conjecture for n=7n=7 . Constr. Approx. , 61(3):603--613, 2025.
  6. T. W. Ng. Smale's mean value conjecture for odd polynomials. J. Aust. Math. Soc. , 75(3):409--411, 2003.
  7. Tuen-Wai Ng and Yongquan Zhang. Smale's mean value conjecture for finite B laschke products. J. Anal. , 24(2):331--345, 2016.
  8. T.W. Ng and C.Y. Tsang. Polynomials Versus Finite B laschke Products , volume 65 of Fields Institute Communications . Springer, Boston, MA., 2013.
  9. Q. I. Rahman and G. Schmeisser. Analytic theory of polynomials , volume 26 of London Mathematical Society Monographs. New Series . The Clarendon Press, Oxford University Press, Oxford, 2002.
  10. W. H. Schikhof. Ultrametric calculus. An introduction to pp -adic analysis , volume 4. Cambridge University Press, Cambridge, 1984.
  11. Bl. Sendov. Generalization of the S male's mean value conjecture. C. R. Acad. Bulgare Sci. , 55(11):5--10, 2002.
  12. Bl. Sendov and N. Nikolov. Variations of S male's mean value conjecture. C. R. Acad. Bulgare Sci. , 56(11):9--14, 2003.
  13. Blagovest Sendov and Pencho Marinov. Verification of S male's mean value conjecture for n≤10n\leq 10 . C. R. Acad. Bulgare Sci. , 60(11):1151--1156, 2007.
  14. T. Sheil-Small. Complex polynomials , volume 75 of Cambridge Studies in Advanced Mathematics . Cambridge University Press, Cambridge, 2002.
  15. M. Shub and S. Smale. Computational complexity: on the geometry of polynomials and a theory of cost. II . SIAM J. Comput. , 15(1):145--161, 1986.
  16. Mike Shub and Steven Smale. Computational complexity. O n the geometry of polynomials and a theory of cost. I . Ann. Sci. École Norm. Sup. (4) , 18(1):107--142, 1985.
  17. Steve Smale. The fundamental theorem of algebra and complexity theory. Bull. Amer. Math. Soc. (N.S.) , 4(1):1--36, 1981.
  18. Steve Smale. On the efficiency of algorithms of analysis. Bull. Amer. Math. Soc. (N.S.) , 13(2):87--121, 1985.
  19. Steve Smale. Mathematical problems for the next century. Math. Intelligencer , 20(2):7--15, 1998.
  20. Steve Smale. Mathematical problems for the next century . Amer. Math. Soc., Providence, RI, 2000.
  21. David Tischler. Critical points and values of complex polynomials. J. Complexity , 5(4):438--456, 1989.
  22. David Tischler. Perturbations of critical fixed points of analytic maps. Astérisque , (222):8, 407--422, 1994.
  23. Jeremy T. Tyson. Counterexamples to T ischler's strong form of S male's mean value conjecture. Bull. London Math. Soc. , 37(1):95--106, 2005.

Version history

  1. v1Submitted by K. MAHESH KRISHNAInitial depositCurrentOct 22, 2026