Inverse condition number
------------------------

                 Key: MATH-602
                 URL: https://issues.apache.org/jira/browse/MATH-602
             Project: Commons Math
          Issue Type: Improvement
    Affects Versions: 2.2, 3.0
         Environment: All
            Reporter: greg sterijevski
            Priority: Minor


In SingularValueDecompositionImpl, the condition number is given as the ratio 
of the largest singular value to the smallest singular value. While this is the 
correct calculation, because of concerns over rank deficiency, researchers have 
traditionally used the inverse of the condition number as a more stable 
indicator of rank deficiency.

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