SUNDIALS is a SUite of Nonlinear and DIfferential/ALgebraic equation Solvers. This release adds:

• a new time-stepping module
• support for relaxation Runge-Kutta methods in ARKODE
• updated F2003 utility routines
• and more

Learn more:

• SUNDIALS v6.6.0 release notes
• The complete SUNDIALS release history
• Downloads via the SUNDIALS website and SUNDIALS GitHub repo