has characteristic is similar to LSODE LSODIS 2007-11-30 http://identifiers.org/isbn/978-0444866073 http://www.nea.fr/abs/html/uscd1225.html LSODIS is a set of general-purpose FORTRAN routines solver for the initial value problem for ordinary differential equation systems. It is suitable for both stiff and nonstiff systems. LSODIS treat systems in the linearly implicit form A(t,y) dy/dt = g(t,y), A = a square matrix, i.e. with the derivative dy/dt implicit, but linearly so. Livermore solver for ordinary differential equations, implicit sparse version dk Livermore solver implicit method type