Invariant Wedges for a Two-Point Reflecting Brownian Motion and the ``Hot Spots'' Problem
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1. | Title | Title of document | Invariant Wedges for a Two-Point Reflecting Brownian Motion and the ``Hot Spots'' Problem |
2. | Creator | Author's name, affiliation, country | Rami Atar; Technion - Israel Institute of Technology |
3. | Subject | Discipline(s) | Mathematics |
3. | Subject | Keyword(s) | Reflecting Brownian motion, Neumann eigenvalue problem, convex domains. |
3. | Subject | Subject classification | 60J30 |
4. | Description | Abstract | We consider domains $D$ of $R^d$, $d\ge 2$ with the property that there is a wedge $V\subset R^d$ which is left invariant under all tangential projections at smooth portions of $\partial D$. It is shown that the difference between two solutions of the Skorokhod equation in $D$ with normal reflection, driven by the same Brownian motion, remains in $V$ if it is initially in $V$. The heat equation on $D$ with Neumann boundary conditions is considered next. It is shown that the cone of elements $u$ of $L^2(D)$ satisfying $u(x)-u(y)\ge0$ whenever $x-y\in V$ is left invariant by the corresponding heat semigroup. Positivity considerations identify an eigenfunction corresponding to the second Neumann eigenvalue as an element of this cone. For $d=2$ and under further assumptions, especially convexity of the domain, this eigenvalue is simple. |
5. | Publisher | Organizing agency, location | |
6. | Contributor | Sponsor(s) | |
7. | Date | (YYYY-MM-DD) | 2001-06-14 |
8. | Type | Status & genre | Peer-reviewed Article |
8. | Type | Type | |
9. | Format | File format | |
10. | Identifier | Uniform Resource Identifier | http://ejp.ejpecp.org/article/view/91 |
10. | Identifier | Digital Object Identifier | 10.1214/EJP.v6-91 |
11. | Source | Journal/conference title; vol., no. (year) | Electronic Journal of Probability; Vol 6 |
12. | Language | English=en | en |
14. | Coverage | Geo-spatial location, chronological period, research sample (gender, age, etc.) | |
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