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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
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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.
Table of contents
Closed dominant Weyl chamber
Fundamental chamber of a root system
Closed dominant Weyl chamber
0
0
0
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)
Fundamental system of a root system
Root system
Root-space decomposition
Cartan subalgebra
Semisimple Lie algebra
Lie algebra
Lie theory
Diagonal dominance
Algebra
Area of mathematics
Mathematics
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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