... condition(s)^3.1

Hovewer, the problem does not support the changes of static system. But it is possible to apply direct displacement control without requiring BC applied (see nrsolver documentation). Therefore it is possible to combine direct displacement control with direct load control or indirect control.

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...

User can set several run-time options, e.g., -ksp_type $[$cg, gmres, bicg, bcgs$]$ -pc_type $[$jacobi, bjacobi,none,ilu,...$]$ -ksp_monitor -ksp_rtol $<$rtol$>$ -ksp_view -ksp_converged_reason. These options will override those that are default (PETSC KSPSetFromOptions() routine is called after any other customization routines).

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