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Dehn's lemma is a result in geometric topology, specifically in the area of 3-manifolds and the study of surfaces embedded within them. It addresses how certain types of simple homotopies can be related to the topology of surfaces in 3-manifolds.

Ancestors (6)

  1. 3-manifolds
  2. Geometric topology
  3. Topology
  4. Fields of mathematics
  5. Mathematics
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