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# KSP_DIVERGED_DTOL

\(||r|| \ge dtol*||b||\)

## Note

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: Linear System Solvers, `KSPNormType`, `KSP_CONVERGED_ATOL`, `KSP_CONVERGED_RTOL`, `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