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# EPSELPA

EPSELPA = “elpa” - A wrapper to ELPA [Auckenthaler et al., 2011].

## Notes

Only available for Hermitian problems.

ELPA is a direct eigensolver, that is, the full spectrum is computed. It uses ScaLAPACK matrix distribution, and hence this solver also involves redistributing the matrices from PETSc storage to ScaLAPACK distribution, and vice versa (this is done automatically by SLEPc). Alternatively, the user may create the problem matrices already with type `MATSCALAPACK`.

## References

[Auc11]

T. Auckenthaler, V. Blum, H.-J. Bungartz, T. Huckle, R. Johanni, L. Krämer, B. Lang, H. Lederer, and P.R. Willems. Parallel solution of partial symmetric eigenvalue problems from electronic structure calculations. Parallel Comput., 37(12):783–794, 2011. doi:10.1016/j.parco.2011.05.002.

## See Also

EPS: Eigenvalue Problem Solver, `EPS`, `EPSType`, `EPSSetType()`

## Level

beginner

## Location

src/eps/impls/external/elpa/elpa.c

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