arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2501.08059math.AP
收藏

希尔伯特空间中非凸能量的时间分数阶梯度流

Time-fractional gradient flows for nonconvex energies in Hilbert spaces

Goro Akagi, Yoshihito Nakajima

AI总结:

本文提出希尔伯特空间中非凸能量的时间分数阶梯度流抽象理论,证明相关演化方程强解的局部与全局存在性,发展配套数学工具并将理论应用于带爆破项的p-Laplace次扩散方程的Cauchy-Dirichlet问题。

摘要:

本文致力于提出希尔伯特空间中非凸能量泛函的时间分数阶梯度流的抽象理论。主要结果包括希尔伯特空间中由两个次微分算子之差控制的时间分数阶演化方程的(连续)强解的局部和全局时间存在性。为证明这些结果,本文发展了分数链式法则、凸梯度流的Lipschitz扰动理论,以及非线性Volterra积分不等式的Gronwall型引理。这些工具在应对由问题的次扩散特性导致的能量(时间)连续性缺失问题中也起到关键作用。此外,该抽象理论还被应用于一类满足所谓Sobolev(次)临界增长条件、带爆破项的p-Laplace次扩散方程的Cauchy-Dirichlet问题。

英文摘要:

This article is devoted to presenting an abstract theory on time-fractional gradient flows for nonconvex energy functionals in Hilbert spaces. Main results consist of local and global in time existence of (continuous) strong solutions to time-fractional evolution equations governed by the difference of two subdifferential operators in Hilbert spaces. To prove these results, fractional chain-rule formulae, a Lipschitz perturbation theory for convex gradient flows and Gronwall-type lemmas for nonlinear Volterra integral inequalities are developed. They also play a crucial role to cope with the lack of continuity (in time) of energies due to the subdiffusive nature of the issue. Moreover, the abstract theory is applied to the Cauchy-Dirichlet problem for some $p$-Laplace subdiffusion equations with blow-up terms complying with the so-called Sobolev (sub)critical growth condition.

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。

↑