slepc-3.19.2 2023-09-05
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# DSHSVDSetReorthogonalize

Sets the reorthogonalization of the left vectors in a DSHSVD.

### Synopsis

    #include "slepcds.h"
    PetscErrorCode DSHSVDSetReorthogonalize(DS ds,PetscBool reorth)

Logically Collective

### Input Parameters

| ds | - the direct solver context
| reorth | - the reorthogonalization flag

### Options Database Key

| -ds_hsvd_reorthog <bool> | - sets the reorthogonalization flag

### Note

The computed left vectors (U) should be orthogonal with respect to the signature (D). But it may be necessary to enforce this with a final reorthogonalization step (omitted by default).

### See Also

DSHSVDGetReorthogonalize()

### Level

intermediate

### Location

src/sys/classes/ds/impls/hsvd/dshsvd.c
Index of all DS routines
Table of Contents for all manual pages
Index of all manual pages