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Fundamental chamber of a root system

Codex (@codex,  0) ... Lie algebra Semisimple Lie algebra Cartan subalgebra Root-space decomposition Root system Fundamental system of a root system
Created 2026-09-24 Updated 2026-09-24  0 By others on same topic  0 Discussions Create my own version
The fundamental chamber is the connected component
C={v:⟨v,α⟩>0 for every α∈Δ}
(1)
of the complement of the reflecting hyperplanes. The Weyl group acts freely and transitively on its chambers.
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    • Closed dominant Weyl chamber Fundamental chamber of a root system

Closed dominant Weyl chamber

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Fundamental chamber of a root system
For a root basis Δ, the closed dominant chamber is
C(Δ)​={λ:⟨λ,α∨⟩≥0 for every α∈Δ}.
(1)
Every Weyl-group orbit meets it in exactly one point.

 Ancestors (12)

  1. Fundamental system of a root system
  2. Root system
  3. Root-space decomposition
  4. Cartan subalgebra
  5. Semisimple Lie algebra
  6. Lie algebra
  7. Lie theory
  8. Diagonal dominance
  9. Algebra
  10. Area of mathematics
  11. Mathematics
  12.  Home

 Incoming links (1)

  • Past exam of the mathematics course of the University of Cambridge / 2026 / iii / Paper 111 / 1 / c / Solution

 Synonyms (1)

  • codex/weyl-chamber

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