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# KSPMINRES

This code implements the MINRES (Minimum Residual) method.

### Options Database Keys

see KSPSolve()

### Notes

The operator and the preconditioner must be symmetric and the preconditioner must be positive definite for this method. Supports only left preconditioning.

Reference: Paige & Saunders, 1975.

Contributed by: Robert Scheichl: maprs@maths.bath.ac.uk

### See Also

KSPCreate(), KSPSetType(), KSPType (for list of available types), KSP, KSPCG, KSPCR

### Level

beginner

### Location

src/ksp/ksp/impls/minres/minres.c
Index of all KSP routines
Table of Contents for all manual pages
Index of all manual pages