is hybrid of LSODA LSODAR Livermore solver LSODA/LSODAR hybrid method 2020-10-29 http://identifiers.org/biosimulators/copasi http://identifiers.org/doi/10.1007/978-1-59745-525-1_2 http://identifiers.org/doi/10.1016/j.jbiotec.2017.06.1200 http://identifiers.org/doi/10.1093/bioinformatics/btl485 http://identifiers.org/doi/10.5555/1218112.1218421 Automatically use LSODA or LSODAR as apropriate for the given problem. Use LSODA if the problem has no roots. Use LSODAR if the problem has roots. JRK