petsc-3.14.6 2021-03-30
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