num pbqp_matrix_get_col_min(pbqp_matrix *matrix, unsigned col_index, vector *flags);
num pbqp_matrix_get_row_min(pbqp_matrix *matrix, unsigned row_index, vector *flags);
+void pbqp_matrix_set_col_value(pbqp_matrix *mat, unsigned col, num value);
+void pbqp_matrix_set_row_value(pbqp_matrix *mat, unsigned row, num value);
+
void pbqp_matrix_sub_col_value(pbqp_matrix *matrix, unsigned col_index,
vector *flags, num value);
void pbqp_matrix_sub_row_value(pbqp_matrix *matrix, unsigned row_index,