Backward uniqueness for solutions of linear parabolic equations
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- by Igor Kukavica PDF
- Proc. Amer. Math. Soc. 132 (2004), 1755-1760 Request permission
Abstract:
We address the backward uniqueness property for the equation $u_t-\Delta u = w_j\partial _{j}u+v u$ in ${\mathbb R}^n\times (T_0,0]$. We show that under rather general conditions on $v$ and $w$, $u|_{t=0}=0$ implies that $u$ vanishes to infinite order for all points $(x,0)$. It follows that the backward uniqueness holds if $w=0$ and $v\in L^{\infty }([0,T_0],L^p({\mathbb R}^n))$ when $p>n/2$. The borderline case $p=n/2$ is also covered with an additional continuity and smallness assumption.References
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Additional Information
- Igor Kukavica
- Affiliation: Department of Mathematics, University of Southern California, Los Angeles, California 90089
- MR Author ID: 314775
- Email: kukavica@usc.edu
- Received by editor(s): February 7, 2003
- Published electronically: December 22, 2003
- Communicated by: David S. Tartakoff
- © Copyright 2003 American Mathematical Society
- Journal: Proc. Amer. Math. Soc. 132 (2004), 1755-1760
- MSC (2000): Primary 35K15
- DOI: https://doi.org/10.1090/S0002-9939-03-07355-6
- MathSciNet review: 2051137