数值分析是研究分析用计算机求解数学计算问题的数值计算方法及其理论的学科，是数学的一个分支，它以数字计算机求解数学问题的理论和方法为研究对象。(Numerical analysis is a branch of mathematics that studies and analyzes the numerical calculation method and theory of solving mathematical problems by computer. It takes the theory and method of digital computer to solve mathematical problems as the research object.)