PETSc version 3.16.5
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# PCApplyTranspose

Applies the transpose of preconditioner to a vector.

### Synopsis

    #include "petscksp.h"
    PetscErrorCode  PCApplyTranspose(PC pc,Vec x,Vec y)

Collective on PC

### Input Parameters

| pc | - the preconditioner context
| x | - input vector

### Output Parameter

| y | - output vector

### Notes

For complex numbers this applies the non-Hermitian transpose.

### Developer Notes

We need to implement a PCApplyHermitianTranspose()

### See Also

PCApply(), PCApplyBAorAB(), PCApplyBAorABTranspose(), PCApplyTransposeExists()

### Level

developer

### Location

src/ksp/pc/interface/precon.c

### Implementations

PCApplyTranspose_ASM in src/ksp/pc/impls/asm/asm.c
PCApplyTranspose_BDDC in src/ksp/pc/impls/bddc/bddc.c
PCApplyTranspose_BDDCIPC in src/ksp/pc/impls/bddc/bddc.c
PCApplyTranspose_Cholesky in src/ksp/pc/impls/factor/cholesky/cholesky.c
PCApplyTranspose_ILU in src/ksp/pc/impls/factor/ilu/ilu.c
PCApplyTranspose_LU in src/ksp/pc/impls/factor/lu/lu.c
PCApplyTranspose_QR in src/ksp/pc/impls/factor/qr/qr.c
PCApplyTranspose_FieldSplit in src/ksp/pc/impls/fieldsplit/fieldsplit.c
PCApplyTranspose_GASM in src/ksp/pc/impls/gasm/gasm.c
PCApplyTranspose_H2OPUS in src/ksp/pc/impls/h2opus/pch2opus.c
PCApplyTranspose_KSP in src/ksp/pc/impls/ksp/pcksp.c
PCApplyTranspose_Mat in src/ksp/pc/impls/mat/pcmat.c
PCApplyTranspose_MG in src/ksp/pc/impls/mg/mg.c
PCApplyTranspose_Redundant in src/ksp/pc/impls/redundant/redundant.c
PCApplyTranspose_Shell in src/ksp/pc/impls/shell/shellpc.c
PCApplyTranspose_SOR in src/ksp/pc/impls/sor/sor.c
PCApplyTranspose_SVD in src/ksp/pc/impls/svd/svd.c
Index of all PC routines
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