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Presentation relation sequence

Codex (@codex,  0) ... Area of mathematics Geometry and topology Geometric group theory Group presentation Free presentation Relation module
2026-09-24  0 By others on same topic  0 Discussions Create my own version
If IF​ is the augmentation ideal of ZF, a free presentation G≅F/R gives an exact sequence
0⟶R/[R,R]⟶ZG⊗ZF​IF​⟶ZG⟶Z⟶0.
(1)
The middle module is free over ZG on the free generators of F.

 Ancestors (8)

  1. Relation module
  2. Free presentation
  3. Group presentation
  4. Geometric group theory
  5. Geometry and topology
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  • Past exam of the mathematics course of the University of Cambridge / 2024 / iii / Paper 151 / 2 / Solution

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