code: public LinearEquationSystem getNormalizedLinearEquationSystem(Normalization<?> normalization) throws NonNumericFeaturesException {
      if(normalization != null) {
        LinearEquationSystem lq = normalization.transform(linearEquationSystem);
        lq.solveByTotalPivotSearch();
        return lq;
      }
      else {
        return linearEquationSystem;
      }
    }
docs: Returns the linear equation system for printing purposes. If normalization
  is null the linear equation system is returned, otherwise the linear
  equation system will be transformed according to the normalization.
  
  @param normalization the normalization, can be null
  @return the linear equation system for printing purposes
  @throws NonNumericFeaturesException if the linear equation system is not
  compatible with values initialized during normalization