Peter Munch

Introduce inverse of MF::get_cell_iterator()

2

@kronbichler As discussed. I am not sure about the names and also I was not sure if we should return `unsigned int` or a pair of `unsigned int`s. In my...

Function to restrict matrices

5

This PR introduces functions that allow to extract parts of a distributed sparse matrix. In the context of Schwarz and Domain Decomposition methods this is known as restriction: `A_i =...

FYI @jh66637

Add MatrixFreeTools::ElementBirthAndDeathMatrixFree

2

references https://github.com/dealii/dealii/issues/12102 depends on #14122

While having a look at the implementation of `GridTools::compute_active_cell_halo_layer()`, I have noticed that they cannot work for periodicity, since they do not consider coinciding vertices here: https://github.com/dealii/dealii/blob/0c0c4557472f13911a42b390c5597383c02a0f72/source/grid/grid_tools_dof_handlers.cc#L748-L751 They should however,...

Merge DoFHandler and hp::DoFHandler - follow up tasks

4

Following tasks need to done after PR #10328 has been merged (and before release 9.4): - [x] remove template parameter `DoFHandlerType` (EDIT @marcfehling #13808) - [x] do not instantiate `hp::DoFHandler`...

As pointed out by @mschreter, the following program has an odd behavior: ```cpp #include using namespace dealii; int main() { double a = std::numeric_limits::lowest(); std::cout