petsc-3.12.1 2019-10-22
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# KSP_NORM_NATURAL

Compute the 'natural norm' of residual sqrt((b - A*x)*B*(b - A*x)) and pass that to the convergence test routine. This is only supported by KSPCG, KSPCR, KSPCGNE, KSPCGS, KSPFCG, KSPPIPEFCG, KSPPIPEGCR

### See Also

KSPNormType, KSPSetNormType(), KSP_NORM_NONE, KSP_NORM_PRECONDITIONED, KSP_NORM_UNPRECONDITIONED, KSPSetConvergenceTest()

### Level

advanced

### Location

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