Derivation is a calculation method in mathematical calculation, which is defined as the limit of the quotient between the increment of dependent variable and the increment of independent variable when the increment of independent variable tends to zero. When a function has a derivative, it is said to be derivative or differentiable.

The extended data derivable function must be continuous. Discontinuous functions must be non-differentiable.

Derivation is the foundation of calculus and an important pillar of calculus calculation. Some important concepts in physics, geometry, economics and other disciplines can be expressed by derivatives.

A mathematical term is to derive a function. Express delivery.

Refer to Baidu Encyclopedia-Deduction