Re: [deal.II] Re: Convergence problem arising for large number of DoFs

Hi Hamed I just browsed your post two years ago. I am not sure if you are still active on this mailing list. But I am very interested in the bug you found because they may be inspiring to me. It looks like in Line 923 and Line 963 you had two temporary distributed solution inside the Newton loo

[deal.II] Re: How to plot a function including "arctan" correctly?

Dear Wolfgang, Thank you very much! >> So, my questions are: >> 1.If I need to get >> >> 4.JPG >> >> >>in every time step, which means that phi_x and phi_y are updated in >> every time step, and the information of phi_x and phi_y are calculated >> from "phi" by using function: "get_functi

Re: [deal.II] Re: How to plot a function including "arctan" correctly?

1. If I make delta larger(left: delta=0.05), or refine the mesh much finer (right:"triangulation.refine_global (9);" while the original is "triangulation.refine_global (7);") then I can get the results without too much oscillations: 6.jpg Yes, that is not surprising. You get oscillations