Hello, I am learning this case, https://petsc.org/release/src/snes/tutorials/ex62.c.html . And try to make myself familiar with the FEM (PetscFE) there. Then I have several questions. 1) PetscDSSetResidual <https://petsc.org/release/manualpages/DT/PetscDSSetResidual/>, For example, line 291, PetscCall <https://petsc.org/release/manualpages/Sys/PetscCall/>(PetscDSSetResidual <https://petsc.org/release/manualpages/DT/PetscDSSetResidual/>(ds, 0, f0_quadratic_u, f1_u)), here, f0_quadratic_u and f1_u is function pointers. Where have the input parameter for these functions been calculated, e.g., u_x. If I want to check the values of these parameters before line 291, how to print that ?
2) Does PetscFE support Nedelec element? Will it be painful to add these modules myself ? Thanks , Xiaodong