Projective space

Projectivization

A projectivization is one way of creating a projective space. Let 𝑉 be a vector space over 𝕂. The projectivization P(𝑉) is the orbit space 𝑉 {0}/𝕂× of scalar multiplication by 𝕂×. geo The following notations are used

P(𝕂𝑛+1)=P𝑛𝕂=PG(𝑛,𝕂)

Projective points are thus equivalence classes of nonzero vectors related by scaling, and may be denoted by Homogenous coördinates. If 𝑉 is a topological vector space, then P(𝑉) is itself a topological space. If 𝕂 is a Galois field, the projective space has a Galois geometry.


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