The organization and management of the discussions that take place in the Diametros forum requires a significant investment of time. We are grateful to all who might be interested in helping us even partially remunerate the persons who perform this work. Generous benefactors who would like to sponsor this or any other debate planned by us (or who would like to become permanent sponsors) may contact the head editor, Prof. WÅ‚odzimierz Galewicz: galewicz@if.uj.edu.pl.