EPSRQCG

EPSRQCG = “rqcg” - The Rayleigh Quotient Conjugate Gradient method.

Notes

This is a preconditioned eigensolver for computing leftmost eigenvalues, similar to EPSLOBPCG, but usually less competitive.

The description of the method is in [Bergamaschi et al., 2006]

The preconditioner is specified via the internal ST object and its associated KSP.

References

[Ber06]

L. Bergamaschi, A. Martínez, and G. Pini. Parallel preconditioned conjugate gradient optimization of the Rayleigh quotient for the solution of sparse eigenproblems. Appl. Math. Comput., 175(2):1694–1715, 2006. doi:10.1016/j.amc.2005.09.015.

See Also

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

Level

beginner

Location

src/eps/impls/cg/rqcg/rqcg.c

---

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