slepc-3.22.1 2024-10-28
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# SVDSolve

Solves the singular value problem.

### Synopsis

    #include "slepcsvd.h"
    PetscErrorCode SVDSolve(SVD svd)

Collective

### Input Parameter

| svd | - singular value solver context obtained from SVDCreate()

### Options Database Keys

| -svd_view | - print information about the solver used
| -svd_view_mat0 | - view the first matrix (A)
| -svd_view_mat1 | - view the second matrix (B)
| -svd_view_signature | - view the signature matrix (omega)
| -svd_view_vectors | - view the computed singular vectors
| -svd_view_values | - view the computed singular values
| -svd_converged_reason | - print reason for convergence, and number of iterations
| -svd_error_absolute | - print absolute errors of each singular triplet
| -svd_error_relative | - print relative errors of each singular triplet
| -svd_error_norm | - print errors relative to the matrix norms of each singular triplet

### Notes

All the command-line options listed above admit an optional argument specifying the viewer type and options. For instance, use '-svd_view_mat0 binary:amatrix.bin' to save the A matrix to a binary file, '-svd_view_values draw' to draw the computed singular values graphically, or '-svd_error_relative :myerr.m:ascii_matlab' to save the errors in a file that can be executed in Matlab.

### See Also

SVDCreate(), SVDSetUp(), SVDDestroy()

### Level

beginner

### Location

src/svd/interface/svdsolve.c

### Examples

src/svd/tutorials/ex8.c
src/svd/tutorials/ex14.c
src/svd/tutorials/ex15.c
src/svd/tutorials/ex15f.F90
src/svd/tutorials/ex45.c
src/svd/tutorials/ex48.c
src/svd/tutorials/ex51.c
src/svd/tutorials/ex52.c
src/svd/tutorials/ex53.c
src/svd/tutorials/cnetwork/embedgsvd.c
Index of all SVD routines
Table of Contents for all manual pages
Index of all manual pages