Minimal proof of a generalized Droz-Farny theorem - Grégoire Nicollier We give a simple proof of a recent generalization of the Droz-Farny line theorem by using complex numbers. ✪ ✪ ✪ ✪ ✪ Link tải tài liệu: LINK TẢI TÀI LIỆU Theo LTTK Education