Real roots of Random Polynomials: Universality close to accumulation points
Aldous, A. P. ; Fyodorov, Y. V.
arXiv, 0309014 / Harvested from arXiv
We identify the scaling region of a width O(n^{-1}) in the vicinity of the accumulation points $t=\pm 1$ of the real roots of a random Kac-like polynomial of large degree n. We argue that the density of the real roots in this region tends to a universal form shared by all polynomials with independent, identically distributed coefficients c_i, as long as the second moment \sigma=E(c_i^2) is finite. In particular, we reveal a gradual (in contrast to the previously reported abrupt) and quite nontrivial suppression of the number of real roots for coefficients with a nonzero mean value \mu_n = E(c_i) scaled as \mu_n\sim n^{-1/2}.
Publié le : 2003-09-04
Classification:  Mathematical Physics,  Condensed Matter,  Nonlinear Sciences - Chaotic Dynamics
@article{0309014,
     author = {Aldous, A. P. and Fyodorov, Y. V.},
     title = {Real roots of Random Polynomials: Universality close to accumulation
  points},
     journal = {arXiv},
     volume = {2003},
     number = {0},
     year = {2003},
     language = {en},
     url = {http://dml.mathdoc.fr/item/0309014}
}
Aldous, A. P.; Fyodorov, Y. V. Real roots of Random Polynomials: Universality close to accumulation
  points. arXiv, Tome 2003 (2003) no. 0, . http://gdmltest.u-ga.fr/item/0309014/