几何的代数方法（An algebraic approach to geometry by Borceux）勘误
本书是几何三部曲的第2部。
- P5
Papus' problem的叙述的第三行，
call \(P_i'\) the intersection of
应该是
call \(P_i\) the ...
- P 14 倒数第四行，
\(\cos \frac{\theta}{2} = || QM ||\)
应该是
\(\cos \frac{\theta}{2} = || OM ||\)
- P 14倒数第3行
\(\Big(\dfrac{y_1 - x_1}{2}, \dfrac{y_2 - x_2}{2}, \dfrac{y_3 - x_3}{2} \Big)\)
应该是
\(\Big(\dfrac{y_1 + x_1}{2}, \dfrac{y_2 + x_2}{2}, \dfrac{y_3 + x_3}{2} \Big)\)
