linzn

Thanks for the reply. For the system matrix `A` I use a matrix-vector product instead of a matrix directly, since my system matrix `A` is dense. Is there any method...

I overwrite the `spmv_impl` and `residual_impl` method ```cpp namespace amgcl { namespace backend { template struct spmv_impl { static void apply(Alpha alpha, const Linear_Solver &A, const Vector1 &x, Beta beta,...

Thanks for your reply. I have double-checked my preconditioner matrix `P`, it does have a problem on the diagonal matrix arrangement, and after reorganizing the elements it works now. However,...

Hi, here is my info of Problem 865, copied from the webpage file: {"stat": {"question_id": 865, "question__article__live": null, "question__article__slug": null, "question__title": "Robot Room Cleaner", "question__title_slug": "robot-room-cleaner", "question__hide": false, "total_acs": 4886,...