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首页> 外文期刊>Journal of Physics, A. Mathematical and General: A Europhysics Journal >Real roots of random polynomials: universality close to accumulation points
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Real roots of random polynomials: universality close to accumulation points

机译:随机多项式的实根:接近累积点的普遍性

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We identify the scaling region of a width O(n(-1)) in the vicinity of the accumulation points t = +/-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;, 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 mun = E(c(i)) scaled as mu(n) similar to n(-1/2). [References: 28]
机译:我们在大度数n的随机Kac式多项式的实根的累积点t = +/- 1的附近确定宽度O(n(-1))的缩放区域。我们认为,只要第二矩sigma = E(c(i)(2))是有限的,则该区域中实根的密度趋于具有所有独立且均等分布系数c的多项式共享的通用形式。 。特别是,我们揭示了一个渐进的(与先前报道的突变相反),并且对于非均值mun = E(c(i))的系数的实根根数的抑制是非常平凡的,其缩放为mu(n)类似于n(-1/2)。 [参考:28]

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