What would be the applications of a gradient of a function of a function?

tianez

When we are using this gradient strategy, since we picked a nabla(F) that works with all u, how do we pick the function u? And how does this choice impact the computation? Are certain u choices going to complicate the derivatives and make computation more expensive?

What other types of gradients are there?

What would be the applications of a gradient of a function of a function?

When we are using this gradient strategy, since we picked a nabla(F) that works with all u, how do we pick the function u? And how does this choice impact the computation? Are certain u choices going to complicate the derivatives and make computation more expensive?