#include "slepceps.h" PetscErrorCode EPSSetEigenvalueComparison(EPS eps,PetscErrorCode (*func)(PetscScalar,PetscScalar,PetscScalar,PetscScalar,PetscInt*,void*),void* ctx)Logically Collective on eps
| eps | - eigensolver context obtained from EPSCreate() | |
| func | - a pointer to the comparison function | |
| ctx | - a context pointer (the last parameter to the comparison function) |
func(PetscScalar ar,PetscScalar ai,PetscScalar br,PetscScalar bi,PetscInt *res,void *ctx)
| ar | - real part of the 1st eigenvalue | |
| ai | - imaginary part of the 1st eigenvalue | |
| br | - real part of the 2nd eigenvalue | |
| bi | - imaginary part of the 2nd eigenvalue | |
| res | - result of comparison | |
| ctx | - optional context, as set by EPSSetEigenvalueComparison() |
| negative | - if the 1st eigenvalue is preferred to the 2st one | |
| zero | - if both eigenvalues are equally preferred | |
| positive | - if the 2st eigenvalue is preferred to the 1st one |
Location: src/eps/interface/epsopts.c