PETSc version 3.16.5
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# KSP_CONVERGED_ATOL

norm(r) <= atol

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_CONVERGED_RTOL, KSP_DIVERGED_DTOL, KSPSolve(), KSPGetConvergedReason(), KSPConvergedReason, KSPSetTolerances()

### Level

beginner

### Location

src/ksp/ksp/guess/../../../../include/petscksp.h
Index of all KSP routines
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Index of all manual pages