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For questions involving the concept of convexity

4 votes
2 answers
977 views

gradient of convex functions

Hello. Can somebody help me with the following question that I have thought over for quite some time, to no avail? Let $f$ be a smooth function (class $\mathrm{C}^{\infty}$), $f:\mathbb{R}^n \longrig …
Qin Shihuang's user avatar