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# BV_ORTHOG_REFINE_NEVER

In the orthogonalization of vectors, never do an iterative refinement step, i.e., do plain CGS or MGS.

## Note

Never refining is not recommended because it will generally make the eigensolver numerically unstable.

## See Also

BV: Basis Vectors, `BVOrthogRefineType`, `BVSetOrthogonalization()`, `BV_ORTHOG_REFINE_IFNEEDED`, `BV_ORTHOG_REFINE_ALWAYS`

## Level

advanced

## Location

include/slepcbv.h

Index of all BV routines Table of Contents for all manual pages Index of all manual pages