Reals and Forcing with an Elementary Topos

  • Saunders Mac Lane
  • Ieke Moerdijk
Part of the Mathematical Sciences Research Institute Publications book series (MSRI, volume 21)


Certain special types of categories, called Toposes, can formulate basic facts about sheaf theory in topology and algebraic geometry and thus clarify the role of geometry in independence proofs by forcing. They also establish a remarkable connection with intuitionist logic. This paper will summarize these results.


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Copyright information

© Springer-Verlag New York, Inc 1992

Authors and Affiliations

  • Saunders Mac Lane
    • 1
  • Ieke Moerdijk
    • 2
  1. 1.Department of MathematicsThe University of ChicagoChicagoUSA
  2. 2.Department of MathematicsThe University of UtrechtUtrechtThe Netherlands

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