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# EPSSCALAPACK

EPSSCALAPACK = “scalapack” - A wrapper to ScaLAPACK eigensolvers [Blackford et al., 1997].

## Notes

Only available for Hermitian problems, using subroutines `pdsyev` and `pdsygvx` and the analogs for other precisions.

This is a direct eigensolver, that is, the full spectrum is computed. The computation 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

[Bla97]

L. S. Blackford, J. Choi, A. Cleary, E. D'Azevedo, J. Demmel, I. Dhillon, J. Dongarra, S. Hammarling, G. Henry, A. Petitet, K. Stanley, D. Walker, and R. C. Whaley. ScaLAPACK Users' Guide. Society for Industrial and Applied Mathematics, Philadelphia, PA, 1997.

## See Also

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

## Level

beginner

## Location

src/eps/impls/external/scalapack/scalapack.c

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