[deal.II] About newton method and a nonlinear DGM equation

[Hyun-Geun Shin]

Hello   I want to solve a nonlinear equation discretized by a DGM. To do it, I am going to use newton method. For newton method F’ = -F,  I need to use the solution at the previous step. In view of step-15, it seems that I can do it. However, I have no ideas and clues on how to access the solution of faces at the previous step. (I need solution values and the gradients) In addition, in step-15, it has solution values at each cell. Hence, using for loop, simply access to the solution in the order is fine. On the contrary, in step-74, there are three parts such as cells, boundary faces and internal faces. I am not sure how to get the solution and use it according to other indices. This concern happens because I do not know the data structure.   Please give me some advice.   Best regards   Hyungeun     -- The deal.II project is located at http://www.dealii.org/ For mailing list/forum options, see https://groups.google.com/d/forum/dealii?hl=en --- You received this message because you are subscribed to the Google Groups "deal.II User Group" group. To unsubscribe from this group and stop receiving emails from it, send an email to dealii+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/dealii/D1153BF7-2C65-416A-B8D1-418DCC88DAB8%40hxcore.ol.