Compactness

  • Bruno Poizat
Part of the Universitext book series (UTX)

Abstract

Every student of topology has heard of filters: If I is a nonempty set, a filter is a set F of subsets of I such that:
  • IF, Ø ∉ F;

  • if X, YF then XYF

  • if XF and XY, then YF.

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Copyright information

© Springer Science+Business Media New York 2000

Authors and Affiliations

  • Bruno Poizat
    • 1
  1. 1.Département des MathématiquesUniversite Claude Bernard Lyon IVilleurbanne CedexFrance

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