How to find the Fenchel dual of this expectation











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I'm trying to figure out the Fenchel dual of the following expectation minimization problem:



$$ min_f E[l(x,f(z))] $$



where $xsim S$ and $zsim T$ ($S$ and $T$ are two distributions here).



I'm not very sure if I'm proceeding properly here because I'm trying to use a technique similar to the last few slides on http://homepages.wmich.edu/~ledyaev/zhu-talk2-sp2016.pdf when he derives Kantorovich duals.



Is this even possible? And how would I do this? I'm honestly stuck because it seemed like the constraint qualifications for the Kantorovich duals came out of nowhere.










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    up vote
    0
    down vote

    favorite












    I'm trying to figure out the Fenchel dual of the following expectation minimization problem:



    $$ min_f E[l(x,f(z))] $$



    where $xsim S$ and $zsim T$ ($S$ and $T$ are two distributions here).



    I'm not very sure if I'm proceeding properly here because I'm trying to use a technique similar to the last few slides on http://homepages.wmich.edu/~ledyaev/zhu-talk2-sp2016.pdf when he derives Kantorovich duals.



    Is this even possible? And how would I do this? I'm honestly stuck because it seemed like the constraint qualifications for the Kantorovich duals came out of nowhere.










    share|cite|improve this question
























      up vote
      0
      down vote

      favorite









      up vote
      0
      down vote

      favorite











      I'm trying to figure out the Fenchel dual of the following expectation minimization problem:



      $$ min_f E[l(x,f(z))] $$



      where $xsim S$ and $zsim T$ ($S$ and $T$ are two distributions here).



      I'm not very sure if I'm proceeding properly here because I'm trying to use a technique similar to the last few slides on http://homepages.wmich.edu/~ledyaev/zhu-talk2-sp2016.pdf when he derives Kantorovich duals.



      Is this even possible? And how would I do this? I'm honestly stuck because it seemed like the constraint qualifications for the Kantorovich duals came out of nowhere.










      share|cite|improve this question













      I'm trying to figure out the Fenchel dual of the following expectation minimization problem:



      $$ min_f E[l(x,f(z))] $$



      where $xsim S$ and $zsim T$ ($S$ and $T$ are two distributions here).



      I'm not very sure if I'm proceeding properly here because I'm trying to use a technique similar to the last few slides on http://homepages.wmich.edu/~ledyaev/zhu-talk2-sp2016.pdf when he derives Kantorovich duals.



      Is this even possible? And how would I do this? I'm honestly stuck because it seemed like the constraint qualifications for the Kantorovich duals came out of nowhere.







      convex-optimization nonlinear-optimization duality-theorems






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      asked Nov 27 at 20:46









      Glassjawed

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