noun
total differential; total derivative
Mathematical term used in multivariable calculus. Refers to the differential of a function of several variables, or the derivative taken with respect to all variables.
関数 f(x, y) の全微分は df = (∂f/∂x)dx + (∂f/∂y)dy で表される。
The total differential of the function f(x, y) is expressed as df = (∂f/∂x)dx + (∂f/∂y)dy.
Compound of 全 (ぜん, 'total, whole') and 微分 (びぶん, 'differential, derivative'). The term is a direct calque from English 'total differential' or 'total derivative'.