Balanced random Toeplitz and Hankel Matrices

Details Balanced random Toeplitz and Hankel Matrices Balanced random Toeplitz and Hankel Matrices

2010-03-27

arxiv.org/abs/1003.5254v1

Mathematics

Probability

Scientific paper

Except the Toeplitz and Hankel matrices, the common patterned matrices for which the limiting spectral distribution (LSD) are known to exist, share a common property--the number of times each random variable appears in the matrix is (more or less) same across the variables. Thus it seems natural to ask what happens to the spectrum of the Toeplitz and Hankel matrices when each entry is scaled by the square root of the number of times that entry appears in the matrix instead of the uniform scaling by $n^{-1/2}$. We show that the LSD of these balanced matrices exist and derive integral formulae for the moments of the limit distribution. Curiously, it is not clear if these moments define a unique distribution.

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