[petsc-users] new book introducing PETSc for PDEs

All -- SIAM Press just published my new book "PETSc for Partial Differential Equations: Numerical Solutions in C and Python": https://my.siam.org/Store/Product/viewproduct/?ProductId=32850137 The book is available both as a paperback and an e-book with working links. A SIAM member discount

Re: [petsc-users] Quite different behaviours of PETSc solver on different clusters

Hi Matt, No, interations from both linear and nonlinear solvers are similar. The system administrator doubt that the latency in mpich makes the difference. We will test a petsc version with OpenMPI on that cluster to check if it makes difference. Thanks, Danyang On October 29, 2020 6:05:53

Re: [petsc-users] TSAdjoint and adaptive time stepping

Does this mean that the adjoint method doesn’t take into account the step adapter? Meaning that the adapter is not differentiated with respect to its dependencies (one of them being the solution at each time step). I can imagine that a discrete adjoint method with a step controller should be

Re: [petsc-users] superlu_dist segfault

Hi Sherry,   I used only 1 OpenMP thread and I also recompiled PETSC in debug mode with OpenMP turned off. But did not help.    Here is the output I can get from SuperLu during the PETSC run         Nonzeros in L       29519630         Nonzeros in U       29519630         nonzeros in L+U