petsc-3.7.1 2016-05-15
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# KSPCR

This code implements the (preconditioned) conjugate residuals method

### Options Database Keys

see KSPSolve() - Many br Many br

Notes: The operator and the preconditioner must be symmetric for this method. The Many brpreconditioner must be POSITIVE-DEFINITE and the operator POSITIVE-SEMIDEFINITE. Many brSupport only for left preconditioning. Many br

### References

1. -Magnus R. Hestenes and Eduard Stiefel, Methods of Conjugate Gradients for Solving Linear Systems, Many brJournal of Research of the National Bureau of Standards Vol. 49, No. 6, December 1952 Research Paper 2379 Many br

### See Also

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

Level:beginner
Location:src/ksp/ksp/impls/cr/cr.c
Index of all KSP routines
Table of Contents for all manual pages
Index of all manual pages