petsc-3.12.4 2020-02-04
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# KSP_NORM_NONE

Do not compute a norm during the Krylov process. This will possibly save some computation but means the convergence test cannot be based on a norm of a residual etc.

Note: Some Krylov methods need to compute a residual norm (such as GMRES) and then this option is ignored

### See Also

KSPNormType, KSPSetNormType(), KSP_NORM_PRECONDITIONED, KSP_NORM_UNPRECONDITIONED, KSP_NORM_NATURAL

### Level

advanced

### Location

src/ksp/ksp/guess/../../../../include/petscksp.h

### Examples

src/ksp/ksp/examples/tutorials/ex71.c.html
Index of all KSP routines
Table of Contents for all manual pages
Index of all manual pages