In this example too, we see that the initial mesh is well adapted
to the function, with more anisotropic features in the dimensions
where the function is elongated than in the dimensions where it
is more uniform. From Fig. 8 the conclusion is drawn that the strategy
to only merge nodes at the leaf level seems to lead to a somewhat
suboptimal mesh contraction, with an initial increase in
mesh nodes as the mesh moves, but after some time the total number
of nodes stabilizes around an equilibrium.