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--- CGAdditionalTerms
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--- ChebyshevFilterLanczosOrder
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ChebyshevFilterLanczosOrder
ChebyshevFilterLanczosOrder
Section SCF::Eigensolver
Type integer
Default 5
Used by the Chebyshev filter only.
The number of Lanczos iterations used to construct the tridiagonal matrix,
from which the upper bound of H is estimated.
A value in the range 4 <= ChebyshevFilterLanczosOrder <= 10 is reasonable.
Values greater than 10 will raise an assertion.
Source information
electrons/eigensolver.F90 : 311
call parse_variable ( namespace , 'ChebyshevFilterLanczosOrder' , default_chebyshev_params % n_lanczos , eigens % cheby_params % n_lanczos )