## Differentiation under the integral

September 14, 2015 07:53 UTC
(Last updated on August 24, 2019 21:37 UTC)

Here is a PDF with an informal proof of a very general form of
differentiation under the integral.

Itâ€™s formulated using geometric algebra and provides a simple demonstration of using some of the basic
identities in geometric calculus.

The end result is: