Shù / xué / shǐ / kè / chéng / tǎo / lùn / le / Dí / shā / gé / duì / shè / yǐng / jǐ / hé / de / gòng / xiàn数学史课程讨论了笛沙格对射影几何的贡献。The history of mathematics course discussed Desargues's contribution to projective geometry.