偏导数符号∂ 是全导数符号d 的变体，这个符号是阿德里安-马里·勒让德引入的，并在雅可比的重新引入后得到普遍接受。The symbol used to denote partial derivatives is ∂. One of the first known uses of this symbol in mathematics is by Marquis de Condorcet from 1770, who ...
请问为什么求偏导时符号不一样？
偏导数符号∂ 是全导数符号d 的变体，这个符号是阿德里安-马里·勒让德引入的，并在雅可比的重新引入后得到普遍接受。
The symbol used to denote partial derivatives is ∂. One of the first known uses of this symbol in mathematics is by Marquis de Condorcet from 1770, who used it for partial differences. The modern partial derivative notation is by Adrien-Marie Legendre (1786), though he later abandoned it; Carl Gustav Jacob Jacobi re-introduced the symbol in 1841.2017-10-04
