PETSc version 3.17.4
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# KSPChebyshevEstEigGetKSP

Get the Krylov method context used to estimate eigenvalues for the Chebyshev method. If a Krylov method is not being used for this purpose, NULL is returned. The reference count of the returned KSP is not incremented: it should not be destroyed by the user.

### Synopsis

    #include "petscksp.h"
    PetscErrorCode KSPChebyshevEstEigGetKSP(KSP ksp, KSP *kspest)

### Input Parameters

| ksp | - the Krylov space context

### Output Parameters

| kspest | - the eigenvalue estimation Krylov space context

### See Also

KSPChebyshevEstEigSet()

### Level

intermediate

### Location

src/ksp/ksp/impls/cheby/cheby.c

### Implementations

KSPChebyshevEstEigGetKSP_Chebyshev in src/ksp/ksp/impls/cheby/cheby.c
Index of all KSP routines
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Index of all manual pages