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arXiv 2408.16985math.AP
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Heisenberg 群中具有奇异初值的半线性抛物方程解的存在性

Existence of solutions semilinear parabolic equations with singular initial data in the Heisenberg group

The Anh Bui, Kotaro Hisa

AI总结:

本文研究了 Heisenberg 群上分数阶半线性热方程的可解性,给出了初值的充要条件,确定了 Fujita 指数并估计了解的寿命。

摘要:

本文研究了 Heisenberg 群 $\mathbb{H}^N$ 中具有幂次非线性的分数阶半线性热方程的可解性,得到了关于初值的必要条件和充分条件。利用这些条件,我们证明了 $1+2/Q$ 划分了 Cauchy 问题整体时间可解性的非线性指数范围(即所谓的 Fujita 指数),其中 $Q=2N+2$ 是 $\mathbb{H}^N$ 的齐次维数,并确定了局部时间可解性时初值奇异性的最优强度。此外,我们的条件对具有非负初值且在空间无穷远处呈多项式衰减的解的寿命给出了精确估计。

英文摘要:

In this paper we obtain necessary conditions and sufficient conditions on the initial data for the solvability of fractional semilinear heat equations with power nonlinearities in the Heisenberg group $\mathbb{H}^N$. Using these conditions, we can prove that $1+2/Q$ separates the ranges of exponents of nonlinearities for the global-in-time solvability of the Cauchy problem (so-called the Fujita-exponent), where $Q=2N+2$ is the homogeneous dimension of $\mathbb{H}^N$, and identify the optimal strength of the singularity of the initial data for the local-in-time solvability. Furthermore, our conditions lead sharp estimates of the life span of solutions with nonnegative initial data having a polynomial decay at the space infinity.

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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