IFISS is an established MATLAB finite element software package for studying strategies for solving partial differential equations (PDEs). IFISS3D is a new add-on toolbox that extends IFISS capabilities for elliptic PDEs from two to three space dimensions. The open-source MATLAB framework provides a computational laboratory for experimentation and exploration of finite element approximation and error estimation, as well as iterative solvers. The package is designed to be useful as a teaching tool for instructors and students who want to learn about state-of-the-art finite element methodology. It will also be useful for researchers as a source of reproducible test matrices of arbitrarily large dimension.

IFISS 是一个成熟的 MATLAB 有限元软件包，用于研究求解偏微分方程 (PDE) 的策略。IFISS3D 是一个新的附加工具箱，它将椭圆偏微分方程的 IFISS 功能从两个空间维度扩展到了三个空间维度。开源 MATLAB 框架为有限元近似和误差估计以及迭代求解器的实验和探索提供了一个计算实验室。该软件包旨在作为一种教学工具，供想要学习最先进的有限元方法的教师和学生使用。它对于研究人员来说也很有用，可以作为任意大维度的可重复测试矩阵的来源。