Seonglae ChoVector-generalized Gradient
Reflects changes according to variable transformation to represent partial derivatives of multivariate functions
Change of variables
In mathematics, a change of variables is a basic technique used to simplify problems in which the original variables are replaced with functions of other variables. The intent is that when expressed in new variables, the problem may become simpler, or equivalent to a better understood problem.
https://en.wikipedia.org/wiki/Change_of_variables