Summary: In the specification of a system with stepfunctions present, the latter cannot be
specified by differential equation form. It seems that our equations for the system
must be in form { dx_{i}/dt = f_{i}(x;y), y'_{i} = a_{i}+b_{i}stp{V_{i}(x;y)} } or { x_{i} = F_{i}(x^{0};y;t), y'_{i} = a_{i}+b_{i}stp{V_{i}(x;y)} }. And as these define the future behaviour of the x's, and as in any case they can usually be solved only numerically, we might as well
leave them in this state. (Compare 1048) (Better 1086)

