computePivotColumns()

template<class RingType>

void LUUtil< RingType >::computePivotColumns ( const Mat & LU, std::vector< size_t > & result_columns )

static

Definition at line 440 of file dmat-lu-inplace.hpp.

{
  result_columns.clear();
  size_t thiscol = 0;
  size_t thisrow = 0;
  while (thisrow < LU.numRows() and thiscol < LU.numColumns())
    {
      if (not LU.ring().is_zero(LU.entry(thisrow, thiscol)))
        {
          result_columns.push_back(thiscol);
          thisrow++;
        }
      thiscol++;
    }
}

Referenced by DMatLinAlg< M2::ARingZZpFlint >::columnRankProfile(), DMatLUinPlace< RingType >::computeLU(), and DMatLinAlg< M2::ARingZZpFlint >::solve().