ArgMin
ArgMin[f,x] gives a position xmin at which f is minimized.
ArgMin[f,{x,y,…}] gives a position {xmin,ymin,…} at which f is minimized.
ArgMin[{f,cons},{x,y,…}] gives a position at which f is minimized subject to the constraints cons.
ArgMin[…,x∈rdom] constrains x to be in the region or domain rdom.
ArgMin[…,…,dom] constrains variables to the domain dom, typically Reals or Integers.
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