# PSCToolkit Suite of parallel sparse linear-algebra libraries (PSBLAS, AMG4PSBLAS, PSBLAS-EXT) with a SUNDIALS interface. In dealii-X it is part of the robust scalable solver layer for large, difficult coupled systems. [Homepage](https://psctoolkit.github.io/) [Repository](https://github.com/psctoolkit/psctoolkit) | ![PSBLAS diagram](../../media/supporting_code/psctoolkit/psblaslibrary.png) | ![AMG4PSBLAS diagram](../../media/supporting_code/psctoolkit/amg4psblaslibrary.png) | | --- | --- | - Role: scalable sparse linear algebra, algebraic multigrid, and preconditioning. - Highlights: PSBLAS, PSBLAS-EXT, AMG4PSBLAS, and SUNDIALS integration in one toolkit. - Local path: `libraries/psctoolkit`