| Type | Location | Extends | Description |
|---|---|---|---|
| Gridpara | comm_variable | None | Type definition for grid parameters |
| GridSystem | CSLP_Solver | None | A data type that collect some info of a (coarse) grid system It is different the type Gridpara, which does not consist any variable like u, rhs, res, and etc. |
| matrix | user_module | None | This is an empty matrix type |
| preconditioner | user_module | None | |
| TwoGrids | deflaion_setup | None | Type definition for a two-grid system. "f" in variable names stands for fine grid, "c" in variable names stands for coarse grid |