SUNDIALS is a SUite of Nonlinear and DIfferential/ALgebraic equation Solvers. This release includes full support for time-dependent mass matrices in ARKStep, interface between ARKStep and the XBraid multigrid reduction in time (MGRIT), a new API (SUNMemoryHelper) to support GPU users who have complex memory management, and much more.

Learn more:

• SUNDIALS v5.4.0 release notes
• The complete SUNDIALS release history
• Downloads via the SUNDIALS website and SUNDIALS GitHub repo