arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1808.04542math.NAcs.NA
收藏

离散-对偶最小残差法(DDMRes)用于Banach空间中的弱对流-反应问题

The Discrete-Dual Minimal-Residual Method (DDMRes) for Weak Advection-Reaction Problems in Banach spaces

Pontificia Universidad Católica de Valparaíso(天主教瓦帕莱索宗座大学);University of Nottingham(诺丁汉大学)

Ignacio Muga, Matthew J. W. Tyler, Kristoffer G. van der Zee

AI总结:

本文提出并分析了在离散对偶范数下求解弱Banach空间中对流-反应方程的最小残差方法,研究了离散子空间对的稳定性与准最优性,并展示了消除Gibbs现象和计算最优测试空间的应用。

摘要:

本文提出并分析了在离散对偶范数下求解弱Banach空间中对流-反应方程的最小残差方法,研究了离散子空间对的稳定性与准最优性,并展示了消除Gibbs现象和计算最优测试空间的应用。

英文摘要:

We propose and analyse a minimal-residual method in discrete dual norms for approximating the solution of the advection-reaction equation in a weak Banach-space setting. The weak formulation allows for the direct approximation of solutions in the Lebesgue $L^p$-space, $1<p<\infty$. The greater generality of this weak setting is natural when dealing with rough data and highly irregular solutions, and when enhanced qualitative features of the approximations are needed. We first present a rigorous analysis of the well-posedness of the underlying continuous weak formulation, under natural assumptions on the advection-reaction coefficients. The main contribution is the study of several discrete subspace pairs guaranteeing the discrete stability of the method and quasi-optimality in $L^p$, and providing numerical illustrations of these findings, including the elimination of Gibbs phenomena, computation of optimal test spaces, and application to 2-D advection.

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。

↑