KSP_DIVERGED_INDEFINITE_PC#
It appears the preconditioner is indefinite (has both positive and negative eigenvalues) and this Krylov method (KSPCG) requires it to be positive definite
Note#
This can happen with the PCICC preconditioner, use the options database option -pc_factor_shift_positive_definite to force
the PCICC preconditioner to generate a positive definite preconditioner
See Also#
KSP: Linear System Solvers, KSPSolve(), KSPGetConvergedReason(), KSPConvergedReason, KSPSetTolerances()
Level#
beginner
Location#
Examples#
src/ksp/pc/tutorials/ex2.c
src/ksp/pc/tutorials/ex1.c
Index of all KSP routines
Table of Contents for all manual pages
Index of all manual pages