报告人：Georgios Akrivis（约阿尼拉大学）

邀请人：李东方

报告时间：2023年10月20日（星期五）14:00-16:00

报告地点：Zoom: 948 8076 7865

报告题目：The linearly BDF method for harmonic maps into spheres

报告摘要：This talk is concerned with the application of the linearly implicit  BDF2 method to the gradient flow problem. More precisely, we devise a projection-free iterative scheme for the approximation of harmonic maps that provides a second-order accuracy of the constraint violation and is unconditionally energy stable. A corresponding error estimate is valid under a mild but necessary discrete regularity condition. The considered problem serves as a model for partial differential equations with holonomic constraints.

报告人简介：Georgios Akrivis，希腊约阿尼拉大学教授，SIAM J Num. Anal 编委。计算数学顶级专家，主要研究微分方程数值解。在Numer Math, Math Comput, SIAM. J. Numer. Anal等杂志发表SCI论文70余篇。