In calculus, an antiderivative, primitive function, primitive integral or indefinite integral of a function  is a differentiable function whose derivative is equal to the original function . This can be stated symbolically as ' . The process of solving for antiderivatives is called antidifferentiation (or indefinite integration) and its opposite operation is called differentiation, which is the process of finding a derivative.

In calculus, an antiderivative, primitive function, primitive integral or indefinite integral of a function  is a differentiable function whose derivative is equal to the original function . This can be stated symbolically as ' . The process of solving for antiderivatives is called antidifferentiation (or indefinite integration) and its opposite operation is called differentiation, which is the process of finding a derivative.