num::inverse_diagonal_options

Defined in header <linear/factorization/probed_inverse_diagonal.hpp>

struct inverse_diagonal_options;

Accuracy and sampling choices for an approximate inverse diagonal.

Members

member	description
approximate_cholesky_preconditioner preconditioner = ac2	AC or AC2.
idx probes = 40	Gaussian right-hand sides h.
idx lanczos_steps = 64	Maximum Krylov steps for the matrix square root.
real tolerance = 1e-8	Relative tolerance between consecutive Lanczos iterates.
unsigned seed = 42	Seed for the probe block and the preconditioner.