Geometry pp 211-219 | Cite as

Making Things Precise

  • Audun Holme


In Section 8.3 we saw how a model for the projective plane may be constructed by taking the northern hemisphere of a spherical surface, including the equator, and then identifying diametrically opposite points on the equator.


Northern Hemisphere Natural Number Equivalence Relation Complex Number Projective Plane 
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Copyright information

© Springer-Verlag Berlin Heidelberg 2002

Authors and Affiliations

  • Audun Holme
    • 1
  1. 1.Department of MathematicsUniversity of BergenBergenNorway

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