木工简易推台锯靠山:projective space是什么意思

来源:百度文库 编辑:神马品牌网 时间:2024/05/04 16:48:00
疑问出自这句话
The line a t + by + c = 0 in 2-space is dual
to the point (a, b, c) E P2 in projective 2-space.
The dual point must live in projective space, since the dual
(a, b, c) must be equivalent to the dual (ka, kb, kc), as the
line at + by + c = 0 is equivalent to the line kat + kby +
kc = 0, k # 0.
这句话出自图形学的一篇论文

投影空间

应该是练习空间吧