Some properties of inversions in alpha plane - Ozcan Gelişgen and Temel Ermis In this paper, the authors introduce inversion which is also valid in the alpha plane geometry, and give some properties such as cross ratio, harmonic conjugates with respect to inversion in the alpha plane geometry. ✪ ✪ ✪ ✪ ✪ Link tải tài liệu: LINK TẢI TÀI LIỆU Theo LTTK Education