git-svn-id: https://geuz.org/svn/gmsh/trunk@18900 59c8cabf-10d6-4a28-b43f-3936b85956c4
Recovering old Slow Formulation

git-svn-id: https://geuz.org/svn/gmsh/trunk@18901 59c8cabf-10d6-4a28-b43f-3936b85956c4