韦达(1540～1603),法国数学家。韦达的主要著作是《分析法引论》。他在自己的著作中,除了改进代数符号外,还发展了解方程的理论;在几何中扩大了应用代数的范围;开始在代数中使用三角,促进了三角学的发展。韦达在数学上的功绩之一是把字母表示数的方法引入代数。他不仅用字母表 Wei Da (1540 ~ 1603), French mathematician. Veda’s main book is “Introduction to Analytical Methods.” In his writings, he not only improved the algebraic symbols, but also developed the theory of equations. He expanded the range of applied algebra in geometry and began to use trigonometry in algebra to promote the development of trigonometry. One of the virtues of Veda in mathematics is the introduction of alphanumeric methods into algebra. He not only uses the alphabet