simpeg.optimization.ProjectedGNCG.cg_atol

property ProjectedGNCG.cg_atol

Absolute tolerance for inner CG iterations.

CG iterations are terminated if: >>> norm(A @ x_k - b) <= max(cg_rtol * norm(A @ x_0 - b), cg_atol)

or if the maximum number of CG iterations is reached.

Returns:

float

See also

cg_rtol, scipy.sparse.linalg.cg