It's called convex analysis, here's a course on the topic: https://lagunita.stanford.edu/courses/Engineering/CVX101/Winter2014/about https://lagunita.stanford.e

It's called convex analysis, here's a course on the topic: https://lagunita.stanford.edu/courses/Engineering/CVX101/Winter2014/about https://lagunita.stanford.edu/courses/Engineering/CVX101/Win...