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Statistics of spectral properties of matrix-valued random variables.

2 votes

stationary measure for linear cocycle(random transformation matrices)

If $A_1=\begin{pmatrix}1&0\\1&1\end{pmatrix}$ and $A_2=\begin{pmatrix}1&1\\0&1\end{pmatrix}$, and the measure on $\{A_1,A_2\}^{\mathbb Z}$ is the $(\frac 12,\frac 12)$ Bernoulli measure, then there is …
Anthony Quas's user avatar
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7 votes
Accepted

Asymptotic behavior of the ratio between the largest two singular values of product of i.i.d...

So this is correct. The theorem that you need is the multiplicative ergodic theorem. Expressing it in your language, it states that $\frac 1n\log s_i(A_n)\to\lambda_i$, where $s_i$ is the $i$th singul …
Anthony Quas's user avatar
  • 23.2k
5 votes
Accepted

Lyapunov exponents of dual / adjoint / transpose random dynamical system (RDS)

The theory is right! If $H_i$ has negative Lyapunov exponents, then images of any vector under the transpose system will be exponentially close to a single vector (everything is being compressed in th …
Anthony Quas's user avatar
  • 23.2k
3 votes

Determine the expected size of a lower triangular sub-matrix of a random matrix?

A reasonable first estimate is $\ell$ (the size of $L$) is approximately $4\log n/|\log p|$. To get this, consider choosing a sequence of $k$ rows $i_1,\ldots,i_k$ and $k$ columns, $j_1,\ldots j_k$. …
Anthony Quas's user avatar
  • 23.2k
10 votes

Probability that a random distance function is metric

Since you haven't given a distribution, let me make an observation giving the right form of the answer in the case where the $D_{xy}$ are independent uniform $[0,1]$ random variables. I want to clai …
Anthony Quas's user avatar
  • 23.2k