What kind of problems is it mostly used for? Please describe.
Nonlinear stiff differential equations with splitting
Describe the algorithm you’d like
The methods described in https://doi.org/10.4208/jcm.2005-m2019-0238 (see also https://doi.org/10.1006/jcph.1996.0193 for related earlier methods)
Other implementations to know about
NA
References
See above