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arXiv 1901.01545math.AP
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一个具有奇异项和非正则数据的非线性抛物问题

A nonlinear parabolic problem with singular terms and nonregular data

Francescantonio Oliva, Francesco Petitta

摘要:

本文研究一类非齐次抛物型边值问题非负解的存在性,该问题具有一般奇异低阶项和非负测度,形式为$$ \begin{cases} \displaystyle u_t - Δ_p u = h(u)f+μ& \text{in}\ Ω\times (0,T),\\ u=0 &\text{on}\ \partialΩ\times (0,T),\\ u=u_0 &\text{in}\ Ω\times \{0\}, \end{cases} $$,其中$$ \begin{cases} \displaystyle u_t - Δ_p u = h(u)f+μ& \text{in}\ Ω\times (0,T),\\ u=0 &\text{on}\ \partialΩ\times (0,T),\\ u=u_0 &\text{in}\ Ω\times \{0\}, \end{cases} $$是$\mathbb{R}^N$的开有界子集($N\ge2$),$u_0$是非负可积函数,$Δ_p$是$p$ -拉普拉斯算子,$μ$是$Ω\times (0,T)$上的非负有界Radon测度,$f$是$L^1(Ω\times (0,T))$的非负函数. $h$项是一个正的连续函数,可能在原点爆炸。此外,我们证明了唯一性的有限能量的解决方案中存在的非递增$h$。

英文摘要:

We study existence of nonnegative solutions to a nonlinear parabolic boundary value problem with a general singular lower order term and a nonnegative measure as nonhomogeneous datum, of the form $$ \begin{cases} \displaystyle u_t - Δ_p u = h(u)f+μ& \text{in}\ Ω\times (0,T),\\ u=0 &\text{on}\ \partialΩ\times (0,T),\\ u=u_0 &\text{in}\ Ω\times \{0\}, \end{cases} $$ where $Ω$ is an open bounded subset of $\mathbb{R}^N$ ($N\ge2$), $u_0$ is a nonnegative integrable function, $Δ_p$ is the $p$-laplace operator, $μ$ is a nonnegative bounded Radon measure on $Ω\times (0,T)$ and $f$ is a nonnegative function of $L^1(Ω\times (0,T))$. The term $h$ is a positive continuous function possibly blowing up at the origin. Furthermore, we show uniqueness of finite energy solutions in presence of a nonincreasing $h$.

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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