ColCompR:

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   Computes the right column compression of a matrix. Compresses the 
   matrix a so that

   comp(a) = [ 0 c ]

   c is of full column rank, i.e. the columns are linearly independent.
   Zero columns are determined by the singular values.
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   Form: 
   [c, v, ac] = ColCompR( a, neps )
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   ------
   Inputs
   ------
   a                   Matrix
   neps                Multiple of machine epsilon to be used
                       as the tolerance for a zero column

   -------
   Outputs
   -------
   c                   Right column compression of a
   v                   ac = a*v
   ac                  a compressed

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