cholesky_decomp col_sum column column copy diag diagonal diagonal dimensions fprintf fread fscanf fwrite get_cols get_element get_rows gslobj gslobj LU_decomp LU_invert LU_lndet m matrix matrix matrix matrix operator!= operator() operator() operator* operator* operator* operator*= operator*= operator+ operator+ operator+ operator+= operator+= operator- operator- operator- operator-= operator-= operator/ operator/= operator= operator= operator== row row row_sum set_dimensions set_element set_tridiag set_zero size1 size2 submatrix sum transpose ~matrix

double & matrix::operator() ( size_t  row, size_t  col  ) Another function returning pointer to (i,j) element of a matrix. Parameters: row : Row index col : Column index Another function that returns a pointer to the (row,col) entry of the matrix.