This work was conducted by Atractor, in the scope of the project Virtual contents in Topology and Dynamical Systems of Programa Apoio C&T, supported by Ciênncia Viva, POCTI and FEDER.
Since many browsers are blocking Java nowadays, it was decided (in 2022) to convert to Javascript the original applets of this section. This conversion was carried out by a high-school teacher, who is working full-time in Atractor with the support of the Ministry of Education.