TITLE

# Stationary measures and rectifiability

AUTHOR(S)
Roger Moser
PUB. DATE
August 2003
SOURCE
Calculus of Variations & Partial Differential Equations;Aug2003, Vol. 17 Issue 4, p357
SOURCE TYPE
DOC. TYPE
Article
ABSTRACT
For integers $1 \le p < n$, we consider $\mathbb{R}ï¿½{n \times n}$-valued Radon measures $\mu = (\mu_{\alpha\beta})$ on an open set $\Omega \subset \mathbb{R}ï¿½n$which satisfy $$\int_\Omega \left({\rm div} \phi d\mu_{\alpha\alpha} - p \, \frac{\partial\phiï¿½\alpha}{\partial xï¿½\beta} d\mu_{\alpha\beta}\right) = 0$$ for all $\phi \in C_0ï¿½1(\Omega,\mathbb{R}ï¿½n)$. We show that under certain conditions, $\mu$]*> has an ( n - p)-dimensional density everywhere, and the set of points of positive density is countably ( n - p)-rectifiable. This simplifies the proofs of several rectifiability theorems involving varifolds with vanishing first variations, p-harmonic maps, or Yang-Mills connections.
ACCESSION #
10498928

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