6: Derivative of Dot and Cross Products - Valuable Vector Calculus - YouTube
Keenan Crane on Twitter: "[26/n] More precisely: The *gradient* is the vector whose _inner product_ with any vector X gives the directional derivative along X. So: a different inner product gives a
Product rule - Wikipedia
real analysis - About the definition of functional derivative and the $L^2$ inner product - Mathematics Stack Exchange
Exterior derivative - Wikipedia
9.1.9. Let L[u] = xu'(x) + u(x) and 0 < a < x | Chegg.com