Page 8 - Textos de Matemática Vol. 39

One set of writings he is justifiably proud of is the comparative study of Mathematics curricula and textbooks for basic and secondary levels in Portugal and several other European countries. This was carried out in the late 1990s by a group chaired by Marques de Sa´, following a consultation from the government to the Portuguese Mathematical Society.
Marques de Sa´’s published writings do not give the full picture of his personality and achievements. To read his notes and papers is always an en- riching experience, but to meet him personally is to come in contact with an exceptional mind.
We would like to thank the mathematicians who contributed with their work to this volume. We also thank our colleague Ju´lio Neves for his help with the editing process. The financial support of the Coimbra Mathematics Center and Department is gratefully acknowledged.
Coimbra, November 2006
The editors