petsc4py.typing.MatSizeSpec

petsc4py.typing.MatSizeSpec = int | tuple[int, int] | tuple[tuple[int, int], tuple[int, int]]

int or (nested) tuple of int describing the matrix sizes.

If int then rows = columns. A single tuple of int indicates (rows, columns). A nested tuple of int indicates ((local_rows, rows), (local_columns, columns)).

See also

Sys.splitOwnership