[petsc-users] Algorithms to remove null spaces in a singular system

[Jed Brown]

Barry Smith <bsmith at mcs.anl.gov> writes:
>   I would make that a separate routine that the users would call first.

We have VecMDot and VecMAXPY.  I would propose adding

  VecQR(PetscInt nvecs,Vec *vecs,PetscScalar *R);

(where R can be NULL).

Does anyone use the "Vecs" type?
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