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# EPS_HARMONIC

The harmonic Ritz extraction.

## Notes

This extraction method may provide better convergence when computing interior eigenvalues close to a given target.

For the particular case of Krylov-Schur, a detailed description can be found in [Roman, 2009].

## References

[Rom09]

J. E. Roman. Practical implementation of harmonic Krylov-Schur. Technical Report STR-9, Universitat Politècnica de València, 2009. URL: https://slepc.upv.es/documentation.

## See Also

EPS: Eigenvalue Problem Solver, `EPSExtraction`, `EPSSetExtraction()`, `EPSSetTarget()`

## Level

advanced

## Location

include/slepceps.h

Index of all EPS routines Table of Contents for all manual pages Index of all manual pages