has characteristic
DASSL
2011-06-10
http://www.nea.fr/abs/html/nesc9918.html
AZ
DASSL is designed for the numerical solution of implicit systems of differential/algebraic equations written in the form F(t,y,y')=0, where F, y, and y' are vectors, and initial values for y and y' are given.
DDASSL
SDASSL
differential algebraic system solver
differential-algebraic equation problem
IDA-like method