BVBiorthonormalizeColumn — SLEPc 3.25.0 documentation

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# BVBiorthonormalizeColumn

Bi-orthonormalize a column of two `BV` objects.

## Synopsis

    #include "slepcbv.h"
    PetscErrorCode BVBiorthonormalizeColumn(BV V,BV W,PetscInt j,PetscReal *delta)

Collective

## Input Parameters

- V - first basis vectors context

- W - second basis vectors context

- j - index of column to be bi-orthonormalized

## Output Parameter

- delta - (optional) value used for normalization

## Notes

This function first bi-orthogonalizes vectors \(v_j\), \(w_j\) against \(W_{0:j-1}\), and \(V_{0:j-1}\), respectively. Then, it scales the vectors with \(1/\delta\), so that the resulting vectors satisfy \(w_j^*v_j = 1\).

## See Also

BV: Basis Vectors, `BVOrthonormalizeColumn()`, `BVBiorthogonalizeColumn()`

## Level

advanced

## Location

src/sys/classes/bv/interface/bvbiorthog.c

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