public function det()
    {
        if ($this->m == $this->n) {
            $d = $this->pivsign;
            for ($j = 0; $j < $this->n; ++$j) {
                $d *= $this->LU[$j][$j];
            }

            return $d;
        }

        throw new CalculationException(Matrix::MATRIX_DIMENSION_EXCEPTION);
    }
public function det()
    {
        if ($this->m == $this->n) {
            $d = $this->pivsign;
            for ($j = 0; $j < $this->n; ++$j) {
                $d *= $this->LU[$j][$j];
            }

            return $d;
        }

        throw new CalculationException(Matrix::MATRIX_DIMENSION_EXCEPTION);
    }
public function det ( ) { if ( $ this -> m == $ this -> n ) { $ d = $ this -> pivsign ; for ( $ j = 0 ; $ j < $ this -> n ; ++ $ j ) { $ d *= $ this -> LU [ $ j ] [ $ j ] ; } return $ d ; } throw new CalculationException ( Matrix :: MATRIX_DIMENSION_EXCEPTION ) ; }
Count determinants.

@return array d matrix deterninat
Count determinants .