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May 7, 2014 at 17:27 history edited Reza Rezazadegan CC BY-SA 3.0
Added a new assumption.
May 7, 2014 at 17:26 comment added Reza Rezazadegan Adding constants or composing with a convex function would be OK as long as we have control on the derivative of this function (at infinity).
May 7, 2014 at 15:47 comment added Sam Lisi Are you willing to make modifications to the psh functions? e.g. add constants, compose them with convex increasing functions, etc? or do you really want to keep $\psi_1$ and $\psi_2$ as they are?
May 5, 2014 at 12:41 history asked Reza Rezazadegan CC BY-SA 3.0