KSP_DIVERGED_BREAKDOWN

A breakdown in the Krylov method was detected so the method could not continue to enlarge the Krylov space. Could be due to a singular matrix or preconditioner. In KSPHPDDM, this is also returned when some search directions within a block are colinear.

See Also

KSP: Linear System Solvers, KSPSolve(), KSPGetConvergedReason(), KSPConvergedReason, KSPSetTolerances()

Level

beginner

Location

include/petscksp.h

Examples

src/ksp/ksp/tutorials/ex77.c

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