gftool.pade.FilterNegImagNum¶
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gftool.pade.
FilterNegImagNum
(abs_num=None, rel_num=None)[source]¶ Return function to check how bad the imaginary part gets.
This methods is designed to create valid_pades for
Averager
. The imaginary part of retarded Green’s functions and self-energies must be negative, this is checked by this filter. All continuations that are valid in this sense are kept, the worst invalid are dropped till only abs_num remain.Warning
Only checked for flat inputs.