| Name | Type | Default | Description |
|---|---|---|---|
| solver | character(len=str_len) | None | |
| arpack_mode | character(len=str_len) | None | |
| which_eigenvalues | character(len=2) | None | |
| number_of_eigenvalues | integer | None | |
| maxiter | integer | None | |
| ncv | integer | None | |
| tolerance | real(kind=dp) | None | |
| sigma | complex(kind=dp) | None |