SpectrumItem

Target spectrum enumerator for iterative eigensolvers. Iterative eigensolvers target specific parts of the spectrum. The allowed values are:

| Value | Target | | ------------- | ------------------------ | | largest_abs | Largest absolute value | | largest_real | Largest real part | | largest_imag | Largest imaginary part | | smallest_abs | Smallest absolute value | | smallest_real | Smallest real part | | smallest_imag | Smallest imaginary part | | both_ends | Both ends |