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Aug 22, 2023 at 12:48 history edited Dirk CC BY-SA 4.0
edited body
Nov 30, 2013 at 12:38 history edited Dirk CC BY-SA 3.0
fixed typo and added link.
Nov 30, 2013 at 12:33 comment added Dirk It does not hold that $F(x_i,y_i) \leq f(x_i)$.
Nov 29, 2013 at 23:37 vote accept GenH
Nov 29, 2013 at 23:37 vote accept GenH
Nov 29, 2013 at 23:37
Nov 29, 2013 at 23:34 comment added GenH Thank you very much, this helps a lot. But I have a question: In the convexity proof, do you really need the $\xi_i$'s? I would just replace the last line in the inequality with $\lambda f(x_1) + (1-\lambda)f(x_2)$, which gives us the convexity.
Nov 26, 2013 at 9:59 history answered Dirk CC BY-SA 3.0