In [2] we investigated the spectrum of a random gl,tph (symmetric matrix). In the present paper we are going to show that the results of [2] carry over to non-symmetric random (Q, 1) matrices (directed graphs), namely the largest eigenvalue is of order n, while the other eigenvalues xre of order n 1
Asymptotic distribution of the even and odd spectra of real symmetric Toeplitz matrices
✍ Scribed by William F. Trench
- Publisher
- Elsevier Science
- Year
- 1999
- Tongue
- English
- Weight
- 87 KB
- Volume
- 302-303
- Category
- Article
- ISSN
- 0024-3795
No coin nor oath required. For personal study only.
✦ Synopsis
If n t rÀs n rYs0 is a real symmetric Toeplitz (RST) matrix then R n has a basis consisting of dna2e eigenvectors x satisfying (A) tx x and na2 eigenvectors y satisfying (B) ty Ày, where t is the ¯ip matrix. We say that an eigenvalue k of n is even if a k-eigenvector of n satis®es (A), or odd if a k-eigenvector of n satis®es (B). We call the collection of even (odd) eigenvalues of n the even (odd) spectrum of n . In the case where t r 1ap p 0 f x cos rx dx a great deal is known about the asymptotic distribution of the eigenvalues of n as n 3 I, under suitable assumptions on f. However, the question of the separate asymptotic distributions of the even and odd spectra does not seem to have been raised.
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## Abstract Let __λ__ be an eigenvalue of an infinite Toeplitz band matrix __A__ and let __λ~n~__ be an eigenvalue of the __n__ ×__n__ truncation __A~n~__ of __A__ . Suppose __λ~n~__ converges to __λ__ as __n__ → ∞. We show that generically the eigenspaces for __λ~n~__ are onedimensional and contai
We consider symmetric Toeplitz matrices n t jrÀsj n rYs1 with t r aq r baq r , where a and b are real and 0 `q `1. We give formulas for det n and À1 n , and show that if a À b 1 and b T 0 then n has eigenvalues k 1n `k2n `Á Á Á `knn such that lim n3I k 1n ÀI, lim n3I k nn I, and fk 2n Y F F F Y k nÀ