.. _V1.01.380: **v1.01.380** ZZZZ380 - Adding fictional degrees of freedom for multigrid solvers ========================================================================================= **Summary:** This test shows the value of adding fictional degrees of freedom when using the multigrid solvers in PETSc and when there are dualized kinematic conditions requiring the use of the keyword ELIM_LAGR =' OUI '. .. toctree:: :hidden: self .. toctree:: :maxdepth: 2 :numbered: Principe_du_test___