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Projectivization [2005-4-19]
iamet 发表在 ∑〖数学〗
| Given a vector space V, its projectivization P(V), sometimes written  , is the set of equivalence classes  for any  in  . For example,complex projective space has homogeneous coordinates  , with not all  .
The projectivization is a manifold with one less dimension than V. In fact, it is covered by the  affine coordinate charts,
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