Compare fem solutions on uniformly refined meshes with the one on a very refined mesh

Hi, in freemfem, is it possible to compare the finite element
solutions on uniformly refined meshes with the solution on
a very very refined one (as a reference solution), in a respectively
norm?
Thanks

Yes , you can use the solution computer on a find grid as ling an analytical solution.

a small old example:
adaptindicatoredp.edp (1.5 KB)

Thanks for pointing out this.