code: def min(self, **kwargs):
          
          out = kwargs.get('out', None)
          if out is not None:
              out[:] = self.min_pt
              return out
          else:
              return self.min_pt
docs: Return `min_pt`.
  
          Parameters
          ----------
          kwargs
              For duck-typing with `numpy.amin`
  
          See Also
          --------
          max
          odl.set.domain.IntervalProd.min
  
          Examples
          --------
          >>> g = RectGrid([1, 2, 5], [-2, 1.5, 2])
          >>> g.min()
          array([ 1., -2.])
  
          Also works with Numpy:
  
          >>> np.min(g)
          array([ 1., -2.])