Decay at infinity of caloric functions within characteristic hyperplanes

Details Decay at infinity of caloric functions within characteristic hyperplanes Decay at infinity of caloric functions within characteristic hyperplanes

2005-09-19

arxiv.org/abs/math/0509436v1

Mathematics

Analysis of PDEs

Scientific paper

It is shown that a function $u$ satisfying, $|\Delta u+\partial_tu|\le
M(|u|+|\nabla u|)$, $|u(x,t)|\le Me^{M|x|^2}$ in $\R^n\times [0,T]$ and
$|u(x,0)|\le C_ke^{-k|x|^2}$ in $\R^n$ and for all $k\ge 1$, must vanish
identically in $\R^n\times [0,T]$.

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