- Affine space
can be embedded in
by
- Affine points can be recovered from projective points with
by
- A projective point with
corresponds to a point at infinity.
- The ray
can be viewed as an additional
ideal point as
recedes to infinity in
a certain direction. For example, in
,
It is important to note that these are affine concepts.
Subhashis Banerjee
2008-01-20