[andrem]

Yes!!

Originally Posted by cooper

Surely you mean physicists not physicians unless he is having conversations about the human body as a complex system--no pun intended .

As far as computational calculus, meaning computing derivatives, integrals, etc, integration by parts pops up in auctions (allthough this is really calc 2) and I remember seeing this other places too but can not remember. As others have mentioned, in macro, multivariable differentiation should be second nature. Allthough its not necessary to get through first semester Micro (using Mas-Collel et. al.) you should understand gradients to build intuition when utility functions are differentiable.