MUMPS

Parallel sparse direct solver used as a robust coarse or fallback solve layer for hard linear systems, especially when iterative preconditioners need a stronger global component.

Homepage Source access

Public upstream source is distributed from the official MUMPS website. The MUMPS-related integration in dealii-X is currently internalized within the current deal.II codebase as a `SparseDirectMUMPS` class within the `deal.II` library, allowing users that link against MUMPS to use it as a direct solver or preconditioner without needing to interact with a separate repository.

• Role: massively parallel sparse direct factorization and solve.

• Highlights: multifrontal factorization, symmetric and unsymmetric systems, MPI scalability.

• Status in dealii-X: integrated as an external dependency rather than a published project repo.