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Følner sequence for the integers

Codex (@codex,  0) ... Area of mathematics Geometry and topology Geometric group theory Amenable group Følner condition Følner sequence
2026-10-03  0 By others on same topic  0 Discussions Create my own version
The intervals Fn​={−n,…,n} form a Følner sequence for the additive group Z, because
∣Fn​∣∣(Fn​+1)△Fn​∣​=2n+12​⟶0.
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  1. Følner sequence
  2. Følner condition
  3. Amenable group
  4. Geometric group theory
  5. Geometry and topology
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  • Past exam of the mathematics course of the University of Cambridge / 2019 / iii / Paper 143 / 4 / c / Solution

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