UNIFORM SUPERAPPROXIMATION OF THE DERIVATIVE OF TETRAHEDRAL QUADRATIC FINITE ELEMENT APPROXIMATION

• 来源期刊: 计算数学(英文版)
• 关键词: Tetrahedron Superapproximation Finite element.
• 年，卷（期）: 2005,（1）
• 页码范围: 75-82
• 页数: 8页
• 语种: 英文

摘要

In this paper,we will prove the derivative of tetrahedral quadratic finite element approximation is superapproximate to the derivative of the quadratic Lagrange interpolant of the exact solution in the L∞-norm, which can be used to enhance the accuracy of the derivative of tetrahedral quadratic finite element approximation to the derivative of the exact solution.