Leibniz's notation is a specific way of representing derivatives, named after the mathematician Gottfried Wilhelm Leibniz. In Leibniz's notation, the derivative of a function y with respect to x is denoted by dy/dx. This notation emphasizes the idea of the ratio of infinitesimally small changes in y to infinitesimally small changes in x.

For example:

If y = f(x), then the derivative dy/dx represents the rate of change of y with respect to x. Leibniz's notation is particularly intuitive when dealing with differentials, where dy and dx represent infinitesimally small changes in y and x, respectively.

Leibniz's notation is widely used in calculus and differential equations and is one of the notations commonly employed to express derivatives.