KSP_CONVERGED_ATOL — PETSc 3.23.0 documentation

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# KSP_CONVERGED_ATOL

\(||r|| \le atol\)

## Notes

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_RTOL` which may apply before this tolerance.

## See Also

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

## Level

beginner

## Location

include/petscksp.h

Index of all KSP routines
Table of Contents for all manual pages
Index of all manual pages