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• W2279671454 abstract "In the first part of this thesis, we study critical points of random polynomials. We choose two deterministic sequences of complex numbers, whose empirical measures converge to the same probability measure in complex plane. We make a sequence of polynomials whose zeros are chosen from either of sequences at random. We show that the limiting empirical measure of zeros and critical points agree for these polynomials. As a consequence we show that when we randomly perturb the zeros of a deterministic sequence of polynomials, the limiting empirical measures of zeros and critical points agree. This result can be interpreted as an extension of earlier results where randomness is reduced. Pemantle and Rivin initiated the study of critical points of random polynomials. Kabluchko proved the result considering the zeros to be i.i.d. random variables. In the second part we deal with the spectrum of products of Ginibre matrices. Exact eigenvalue density is known for a very few matrix ensembles. For the known ones they often lead to determinantal point process. Let X1, X2,..., Xk be i.i.d Ginibre matrices of size n ×n whose entries are standard complex Gaussian random variables. We derive eigenvalue density for matrices of the form X1 e1 X2 e2 ... Xk ek , where ei = ±1 for i =1,2,..., k. We show that the eigenvalues form a determinantal point process. The case where k =2, e1 +e2 =0 was derived earlier by Krishnapur. In the case where ei =1 for i =1,2,...,n was derived by Akemann and Burda. These two known cases can be obtained as special cases of our result." @default.
• W2279671454 created "2016-06-24" @default.
• W2279671454 creator A5088191936 @default.
• W2279671454 date "2016-02-17" @default.
• W2279671454 modified "2023-09-27" @default.
• W2279671454 title "On Critical Points of Random Polynomials and Spectrum of Certain Products of Random Matrices" @default.
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