#include "petscmat.h" PetscErrorCode MatMFFDWPSetComputeNormU(Mat A,PetscBool flag)

A | - the matrix created with MatCreateSNESMF() | |

flag | - PETSC_TRUE causes it to compute ||U||, PETSC_FALSE uses the previous value |

-mat_mffd_compute_normu <true,false> | - true by default, false can save calculations but you must be sure that ||U|| has not changed in the mean time. |

Index of all Mat routines

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Index of all manual pages