English Descriptors
PME 27 and PMENA July 2003 Honolulu , inter American HPM 2003- HPM satellite of the XI inter- American conference on mathematics education 14- 17 July 2003 , VII symposium of SEIEM 11-13 September 2003Granada , colloquium Francois viete, un mathematician en son temps 19-20 September 2003
