Applets of this series are evolution graph sketchers.
Behind each, there is a dynamical system depending on one control parameter.
The user "draws" a graph by deriving that control parameter
during some time interval.
They all share the same abstract structure, so that new applets corresponding
to other models are easy to make.
These applets were conceived by me,
developed and implemented by Lara Santos under Project
Matemática em Acção
of CMAFUL.
Some will be transformed to be
answer input editors for
problems of a future
CATS' model.
