petsc-master 2020-09-18
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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

KSPSolve(), KSPGetConvergedReason(), KSPConvergedReason, KSPSetTolerances()

Level

beginner

Location

src/ksp/ksp/guess/../../../../include/petscksp.h

Examples

src/ksp/ksp/tutorials/ex77.c.html

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