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arXiv 2301.12239math.AP
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分数热型问题中零点的向前时间传播

On the forward in time propagation of zeros in fractional heat type problems

Agnid Banerjee, Nicola Garofalo

摘要:

本文证明了:如果$u$在$\mathbb R^n_x \times \mathbb R_t$中求解$(\partial_t - Δ)^s u = Vu$,并且在点$(x_0, t_0)$处无穷阶消失,则$u \equiv 0$在$\mathbb R^n_x \times \mathbb R_t$中.这使我们先前的结果更加尖锐(和完善),即如果在$(x_0, t_0)$处$u(\cdot, t) \equiv 0$消失到无穷阶,则证明了对于$t \leq t_0$的$u(\cdot, t) \equiv 0$。

英文摘要:

In this short note we prove that if $u$ solves $(\partial_t - Δ)^s u = Vu$ in $\mathbb R^n_x \times \mathbb R_t$, and vanishes to infinite order at a point $(x_0, t_0)$, then $u \equiv 0$ in $\mathbb R^n_x \times \mathbb R_t$. This sharpens (and completes) our earlier result that proves $u(\cdot, t) \equiv 0$ for $t \leq t_0$ if it vanishes to infinite order at $(x_0, t_0)$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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