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arXiv 2205.15664math.AP
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一类非线性时空分数阶扩散方程解的定性性质

Qualitative properties of solutions to a nonlinear time-space fractional diffusion equation

Meiirkhan B. Borikhanov, Michael Ruzhansky, Berikbol T. Torebek

摘要:

本文研究了具有多项式非线性项$$\mathcal{D}_{0|t}^{α}u+(-Δ)^s_pu=γ|u|^{m-1}u+μ|u|^{q-2}u,\,γ,μ\in\mathbb{R},\,m>0,q>1,$$的非局部非线性扩散方程的狄利克雷问题,该问题涉及时间分数阶Caputo导数$\mathcal{D}_{0|t}^α$和空间分数阶$p$算子$(-Δ)^s_p$ .我们给出了一个简单的证明所考虑的问题,使用纯代数关系的比较原则,为不同的$γ,μ,m$和$q$集。利用Galerkin逼近方法证明了局部弱解的存在性。利用比较原理对爆破现象、整体弱解的存在性和整体解的渐近性态进行了分类。

英文摘要:

In the present paper, we study the Cauchy-Dirichlet problem to the nonlocal nonlinear diffusion equation with polynomial nonlinearities $$\mathcal{D}_{0|t}^{α}u+(-Δ)^s_pu=γ|u|^{m-1}u+μ|u|^{q-2}u,\,γ,μ\in\mathbb{R},\,m>0,q>1,$$ involving time-fractional Caputo derivative $\mathcal{D}_{0|t}^α$ and space-fractional $p$-Laplacian operator $(-Δ)^s_p$. We give a simple proof of the comparison principle for the considered problem using purely algebraic relations, for different sets of $γ,μ,m$ and $q$. The Galerkin approximation method is used to prove the existence of a local weak solution. The blow-up phenomena, existence of global weak solutions and asymptotic behavior of global solutions are classified using the comparison principle.

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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