Homology 3-Spheres

  • Nikolai Saveliev
Part of the Encyclopaedia of Mathematical Sciences book series (EMS, volume 140)


Let R be a commutative ring with an identity element. By an R-homology 3-sphere we will mean a closed oriented 3-manifold M such that H * (M, R) = H * (S 3 , R). In dimension three, the concepts of topological, smooth, and PL manifolds coincide, as do the concepts of diffeomorphism, homeomorphism and PL-homeomorphism, see [26] and [222]. Therefore, we can work in all three categories interchangeably. Usually, ℤ-homology spheres are referred to as integral homology spheres, and ℚ-homology spheres as rational homology spheres. Homology 3-spheres exist in abundance. We begin with some examples and constructions.


Lens Space Dehn Twist Integral Homology Homology Sphere Heegaard Splitting 
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Copyright information

© Springer-Verlag Berlin Heidelberg 2002

Authors and Affiliations

  • Nikolai Saveliev
    • 1
  1. 1.Department of MathematicsUniversity of MiamiCoral GablesUSA

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