Work described in these pages has been supported in part by the IST Programme of the EU as a Shared-cost RTD (FET Open) Project under Contract No IST-2000-26473 (ECG - Effective Computational Geometry for Curves and Surfaces), by The Israel Science Foundation founded by the Israel Academy of Sciences and Humanities (MOKED - Center for Geometric Computing and its Applications), and by the Hermann Minkowski -- Minerva Center for Geometry at Tel Aviv University.

Past support include ESPRIT IV LTR Projects No.~21957 (CGAL) and No.~28155 (GALIA), and grants by the USA-Israel Binational Science Foundation and by a Franco-Israeli reserach grant ``factory of the future'' (monitored by AFIRST/France and The Israeli Ministry of Science),