Real zeros of random algebraic polynomials with binomial elements
Abstract
This paper provides an asymptotic estimate for the expected number of real zeros of a random algebraic polynomial a0 + a1x + a2x2 + …+an−1xn−1. The coefficients aj(j = 0, 1, 2, …, n − 1) are assumed to be independent normal random variables with mean zero. For integers m and k = O(logn) 2 the variances of the coefficients are assumed to have nonidentical value , where n = k · m and i = 0, 1, 2, …, m − 1. Previous results are mainly for identically distributed coefficients or when . We show that the latter is a special case of our general theorem.