Study and traduction of the Shulbastra (Indian texts devoted to the construction of the vedic altars having an important
mathematical content) with the help of their manuscript commentaries (Venkateshvara, Dvarakanatha) and edition. Comparative study of the
Greek mathematical knowledge (up to the time of Plato), especially as to their relation with the ritual (duplication of the cube,
geometry of areas). Geometry in Mesopotamia, Egypt, China.