On the distribution of critical points of a polynomial

Sneha Dey Subramanian (University of Pennsylvania)

Abstract


This paper proves that if points $Z_1,Z_2,...$ are chosen independently and identically using some measure $\mu$ from the unit circle in the complex plane, with $p_n(z) = (z-Z_1)(z-Z_2)...(z-Z_n)$, then the empirical distribution of the critical points of $p_n$ converges weakly to $\mu$.


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Pages: 1-9

Publication Date: August 26, 2012

DOI: 10.1214/ECP.v17-2040

References

  • Chandrasekharan, K. Introduction to analytic number theory. Die Grundlehren der mathematischen Wissenschaften, Band 148 Springer-Verlag New York Inc., New York 1968 viii+140 pp. MR0249348
  • Cheung, Wai Shun; Ng, Tuen Wai. A companion matrix approach to the study of zeros and critical points of a polynomial. J. Math. Anal. Appl. 319 (2006), no. 2, 690--707. MR2227932
  • Conway, John B. Functions of one complex variable. Second edition. Graduate Texts in Mathematics, 11. Springer-Verlag, New York-Berlin, 1978. xiii+317 pp. ISBN: 0-387-90328-3 MR0503901
  • de Bruijn, N. G.: On the zeros of a polynomial and of its derivative. phIndag. Math. 8, (1946), 635--642. MR0019157
  • de Bruijn, N. G. and Springer, T. A.: On the zeros of a polynomial and of its derivative. II. phIndag. Math. 9, (1947), 458-464. MR0021148
  • DueƱez, Eduardo; Farmer, David W.; Froehlich, Sara; Hughes, C. P.; Mezzadri, Francesco; Phan, Toan. Roots of the derivative of the Riemann-zeta function and of characteristic polynomials. Nonlinearity 23 (2010), no. 10, 2599--2621. MR2683784
  • Kabluchko, Z.: Critical points of random rolynomials with independent identically distributed roots. ARXIV1206.6692v1
  • Keating, J. P.; Snaith, N. C. Random matrix theory and $\zeta(1/2+it)$. Comm. Math. Phys. 214 (2000), no. 1, 57--89. MR1794265
  • Komarova, Natalia L.; Rivin, Igor. Harmonic mean, random polynomials and stochastic matrices. Adv. in Appl. Math. 31 (2003), no. 2, 501--526. MR2001626
  • Pemantle, Robin. Analytic combinatorics in $d$ variables: an overview. Algorithmic probability and combinatorics, 195--220, Contemp. Math., 520, Amer. Math. Soc., Providence, RI, 2010. MR2681861 http://www.math.upenn.edu/~pemantle/papers/Preprints/hyperbolic.pdf
  • Pemantle, R. and Rivin, I.: The distribution of the zeroes of the derivative of a random polynomial. ARXIV1109.5975v1
  • Rahman, Q. I.; Schmeisser, G. Analytic theory of polynomials. London Mathematical Society Monographs. New Series, 26. The Clarendon Press, Oxford University Press, Oxford, 2002. xiv+742 pp. ISBN: 0-19-853493-0 MR1954841
  • Stone, M. H. The generalized Weierstrass approximation theorem. Math. Mag. 21, (1948). 167--184, 237--254. MR0027121


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