KSP_CONVERGED_RTOL#

norm(r) <= rtolnorm(b) or rtolnorm(b - A*x_0) if KSPConvergedDefaultSetUIRNorm() was called

See KSPNormType and KSPSetNormType() for possible norms that may be used. By default for left preconditioning it is the 2-norm of the preconditioned residual, and the 2-norm of the residual for right preconditioning

See also KSP_CONVERGED_ATOL which may apply before this tolerance.

See Also#

KSP: Linear System Solvers, KSPNormType, KSP_CONVERGED_ATOL, KSP_DIVERGED_DTOL, KSPSolve(), KSPGetConvergedReason(), KSPConvergedReason, KSPSetTolerances()

Level#

beginner

Location#

include/petscksp.h


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Index of all KSP routines
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Index of all manual pages