Marco Feder

Depends on #14097 , the relevant commit is 24e42c0ebc8ce61972e193f9357f14dd2e8fdbfe This PR provides a function `compute_intersection_of_cells()` that returns a `std::vector,` where each array identifies a simplex of the sub-tassellation of the...

Clean cgal utilities

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This PR cleans a little the CGAL utilities already available. To minimize code duplication, I added `mapped_quadrature( const std::vector &simplices)` that takes a vector of simplices (each one identified by...

NonMatching: Compute exact coupling mass matrix and exact sparsity pattern

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Depends on #13807 , only latest commit ae4ece9c5f2f9db7c22c603835e4aec93b6b3881 should be considered. This PR adds to `NonMatching` the following functions: - `create_coupling_sparsity_pattern_with_exact_intersections` - `create_coupling_mass_matrix_with_exact_intersections` that build an "exact" sparsity pattern and...

Is `point_inside()` failing with an hyper_ball?

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Dear all, If I ask whether a vertex of a boundary cell of an `hyper_ball` is inside the cell itself, it turns out that some vertices are inside, while others...

Quadrature rules and `NonMatching` namespace

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Dear all, we currently have the`NonMatching::QuadratureGenerator` class to generate high-order quadrature rules for different regions of a bounding box. A "similar" function (as it should be used to assemble coupling...

Add step-88: matrix-free, non-nested, geometric multigrid

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This PR, written by @peterrum and me, adds a tutorial which shows the usage of the non-nested multigrid infrastructure. It solves a Poisson problem on a sequence of non-nested meshes...

Read POINT_DATA from .vtk files

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This PR adds support for reading point data from .vtk files. As with cell data, each field is stored in a `Vector`. A test has been added using a mesh...

SparseDirectMUMPS and LA::distributed::Vector

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This PR allows `SparseDirectMUMPS` to be used together with `LinearAlgebra::distributed::Vector`s. A test has been adapted to verify the correct behavior.

Map only locally owned dofs to support points.

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Follow-up on https://github.com/dealii/dealii/pull/19040#issuecomment-3607972953 With this, only locally owned support points are mapped. The `bool` argument introduced in the previous PR has been removed accordingly. Particle generation logic and the output...

Map DoFs to support points for systems with components lacking support points

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Previously, it was not possible to call `DoFTools::map_dofs_to_support_points()` on a system of finite elements that included a component without support points, even when the component mask was set correctly. This...