Skip to main content
Search type Search syntax
Tags [tag]
Exact "words here"
Author user:1234
user:me (yours)
Score score:3 (3+)
score:0 (none)
Answers answers:3 (3+)
answers:0 (none)
isaccepted:yes
hasaccepted:no
inquestion:1234
Views views:250
Code code:"if (foo != bar)"
Sections title:apples
body:"apples oranges"
URL url:"*.example.com"
Saves in:saves
Status closed:yes
duplicate:no
migrated:no
wiki:no
Types is:question
is:answer
Exclude -[tag]
-apples
For more details on advanced search visit our help page
Results tagged with
Search options not deleted user 15517

Theory and applications of probability and stochastic processes: e.g. central limit theorems, large deviations, stochastic differential equations, models from statistical mechanics, queuing theory.

0 votes
Accepted

Limiting eigenvalue distribution of $(I-A)^T(I-A)$

I know that the limiting eigenvalue distribution satisfies a variational principle (see e.g. the joint work with A. Kuijlaars Large Deviations for a Non-Centered Wishart Matrix) from which you may der …
Adrien Hardy's user avatar
  • 2,135
1 vote
0 answers
59 views

A determinantal mixture of probability densities

I came up with this operation after playing with determinantal point processes: Given two probability densities $f,g$ defined on some measurable space with reference measure $\mu$, set $$ f\star g(x …
Adrien Hardy's user avatar
  • 2,135
1 vote

Estimate on lowest eigenvalue in GOE

By symmetry you're looking at the probability that the maximal eigenvalue is smaller than some number. Explicit inequalities for such events can be obtained by using the tridiagonal representation for …
Adrien Hardy's user avatar
  • 2,135
2 votes

Wiener Measure measure on functions?

It seems that what you are looking for is the notion of "abstract Wiener space", which provides a rigorous setting for putting a white noise on various spaces of functions. Long story short, you defin …
Adrien Hardy's user avatar
  • 2,135
1 vote

Sampling from Sine Kernel and Airy Kernel

I'm less enthusiastic than the previous answers concerning how your question is easily solvable: What tells the HKPV algorithm mentioned above is that you can exactly sample a determinantal point proc …
Adrien Hardy's user avatar
  • 2,135
2 votes

Semicircle law universality elsewhere

If you accept non-commutative random variables as "other random processes $(X_1,\ldots,X_n)$" then, as Jon Bannon's comment suggests, free probability could provide interesting examples [and I don't t …
Adrien Hardy's user avatar
  • 2,135
1 vote

Characteristic polynomials of certain random symmetric matrices and the complexity of rando...

Just an heuristic answer: The joint eigenvalue distribution of a GOE random matrix is given by $$ \frac{1}{Z_n}\prod_{i<j}|x_i-x_j|\prod_{i=1}^ne^{-x_i^2/2}dx_i. $$ Thus, $E_{GOE}(|\det(y+A)|e^{-x(tr …
3 votes
2 answers
1k views

A sufficient condition for a probability measure to have compact support

Consider a probability measure $\mu$ on, let's say, $\mathbb R$. Is there a necessary and sufficient condition so that $\mu$ has compact support $Supp(\mu)$ ? I agree this question is too vague, an …
Adrien Hardy's user avatar
  • 2,135
2 votes
Accepted

Countably many random vectors and related problems.

Yes, you can define properly the first expectation, see e.g. PlanetMath Then you have with your notations $$ \mathbb E_{X_i : i\in\mathbb N}\int_{[0,1]^k}\inf_{i\in\mathbb N}\|X_i-y\|^2dy\leq \math …
Adrien Hardy's user avatar
  • 2,135
0 votes

What is the name for a non-normalized distribution?

For an absolutely continuous finite Borel measure $\mu(dx)=f(x)dx$ on $\mathbb R$, if $\mu(\mathbb R)\neq 1$ then $f$ is sometimes called the "intensity" of the measure.
Adrien Hardy's user avatar
  • 2,135
4 votes
1 answer
708 views

Classical convolution VS Free Convolution

We denote $\varphi:\mathbb R^2\rightarrow\mathbb R$ the addition of real numbers, and $\varphi_*:M_1(\mathbb R^2)\rightarrow M_1(\mathbb R)$ the induced push-forward map (where $M_1(\Delta)$ stands fo …
Adrien Hardy's user avatar
  • 2,135
5 votes
2 answers
869 views

A generalization of the Sanov Theorem

Let $(X_n)_{n\in\mathbb{N}}$ be a sequence of i.i.d random variables with law $\mu$. The Sanov Theorem then states that the empirical measures $$ \mu^N =\frac{1}{N} \sum _{n=1}^N\delta _{X_n} $$ sat …
Adrien Hardy's user avatar
  • 2,135
7 votes
0 answers
438 views

Extracting particles from a determinantal point process

Consider $N$ real random particles $x_1,\cdots, x_N$ distributed according to a density $\rho(x_1,\ldots,x_N)$ with respect to the Lebesgue measure on $\mathbb R^N$, which is assumed to be invariant u …
Adrien Hardy's user avatar
  • 2,135
1 vote

analogue of GUE and Ginibre in higher dimensions

By $\|z_1\|$, I understand you mean the maximal modulus of the $z_i$'s. If you are interested in the process of the $\|z_i\|$'s, you have no chance for a determinantal structure since you may have tw …
Adrien Hardy's user avatar
  • 2,135
6 votes
Accepted

Eigenvalue densities of sample covariance matrices when the population covariance matrix is ...

You can rewrite $$ S=\frac{1}{M}C^{1/2}XX^T(C^{1/2})^T $$ where $X_{.j}\sim \mathcal{N}(\boldsymbol 0, \boldsymbol I)$. It is then classical that the limiting eigenvalue distribution of $S$ (in the …
Adrien Hardy's user avatar
  • 2,135

15 30 50 per page