Terminology for sets of minimum points












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In optimization there are definitions of concept like a local minimizer, strict local minimizer, isolated local minimizer, isolated critical point and so on. In my experience these always refer to a single point. I wonder if there is any established terminology for e.g. a path connected set of minimizers that are strict local minimizers when considered as a set?



Take for example a function $f:mathbb{R}^nrightarrowmathbb{R}$ and a path-connected set $S={xinmathbb{R}^n}$ of minimizers of $f$. Assume that there is a $delta>0$ such that $f|_{S}<f(y)$ for all $yin B_delta(S)={yinmathbb{R}^n,|,exists,xin S,,|y-x|<delta}$. Is there an established term for $S$? If so, could you provide a reference where it is used.










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    $begingroup$


    In optimization there are definitions of concept like a local minimizer, strict local minimizer, isolated local minimizer, isolated critical point and so on. In my experience these always refer to a single point. I wonder if there is any established terminology for e.g. a path connected set of minimizers that are strict local minimizers when considered as a set?



    Take for example a function $f:mathbb{R}^nrightarrowmathbb{R}$ and a path-connected set $S={xinmathbb{R}^n}$ of minimizers of $f$. Assume that there is a $delta>0$ such that $f|_{S}<f(y)$ for all $yin B_delta(S)={yinmathbb{R}^n,|,exists,xin S,,|y-x|<delta}$. Is there an established term for $S$? If so, could you provide a reference where it is used.










    share|cite|improve this question









    $endgroup$















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      1








      1





      $begingroup$


      In optimization there are definitions of concept like a local minimizer, strict local minimizer, isolated local minimizer, isolated critical point and so on. In my experience these always refer to a single point. I wonder if there is any established terminology for e.g. a path connected set of minimizers that are strict local minimizers when considered as a set?



      Take for example a function $f:mathbb{R}^nrightarrowmathbb{R}$ and a path-connected set $S={xinmathbb{R}^n}$ of minimizers of $f$. Assume that there is a $delta>0$ such that $f|_{S}<f(y)$ for all $yin B_delta(S)={yinmathbb{R}^n,|,exists,xin S,,|y-x|<delta}$. Is there an established term for $S$? If so, could you provide a reference where it is used.










      share|cite|improve this question









      $endgroup$




      In optimization there are definitions of concept like a local minimizer, strict local minimizer, isolated local minimizer, isolated critical point and so on. In my experience these always refer to a single point. I wonder if there is any established terminology for e.g. a path connected set of minimizers that are strict local minimizers when considered as a set?



      Take for example a function $f:mathbb{R}^nrightarrowmathbb{R}$ and a path-connected set $S={xinmathbb{R}^n}$ of minimizers of $f$. Assume that there is a $delta>0$ such that $f|_{S}<f(y)$ for all $yin B_delta(S)={yinmathbb{R}^n,|,exists,xin S,,|y-x|<delta}$. Is there an established term for $S$? If so, could you provide a reference where it is used.







      optimization terminology






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      asked Dec 23 '18 at 7:38









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