Lie groups a special role is played by torus subgroups, in particular by the maximal torus subgroups. A torus in a compact Lie group G is a compact, connected...
10 KB (1,734 words) - 04:22, 10 December 2023
is called a torus of revolution, also known as a ring torus. If the axis of revolution is tangent to the circle, the surface is a horn torus. If the axis...
40 KB (5,166 words) - 11:29, 5 May 2025
Compact group (section Maximal tori and root systems)
torus theorem which states that every element of K {\displaystyle K} belongs to a maximal torus and that all maximal tori are conjugate. The maximal torus...
30 KB (4,472 words) - 20:43, 23 November 2024
given a torus T < G (which need not be maximal), the Weyl group with respect to that torus is defined as the quotient of the normalizer of the torus N = N(T)...
21 KB (3,256 words) - 23:36, 23 November 2024
with a, b, c, d real and ad − bc = 1. A maximal compact connected abelian Lie subgroup, or maximal torus T, is given by the subset of all matrices of...
21 KB (3,517 words) - 18:29, 23 March 2025
Here the group B is a Borel subgroup and N is the normalizer of a maximal torus contained in B. The notion was introduced by Armand Borel, who played...
6 KB (948 words) - 20:55, 14 May 2025
In mathematics, an algebraic torus, where a one dimensional torus is typically denoted by G m {\displaystyle \mathbf {G} _{\mathbf {m} }} , G m {\displaystyle...
24 KB (3,967 words) - 16:22, 14 May 2025
For a linear algebraic group G, a maximal torus in G means a torus in G that is not contained in any bigger torus. For example, the group of diagonal...
41 KB (6,000 words) - 12:59, 4 October 2024
contains a split maximal torus T over k (that is, a split torus in G whose base change to k ¯ {\displaystyle {\overline {k}}} is a maximal torus in G k ¯ {\displaystyle...
56 KB (8,018 words) - 09:30, 15 April 2025
{h}}} may be taken as the complexification of the Lie algebra of a maximal torus of the compact group. If g {\displaystyle {\mathfrak {g}}} is a linear...
15 KB (2,053 words) - 11:13, 22 February 2025
characters of an F-stable maximal torus, which is irreducible (up to sign) when the character is in general position. When the maximal torus is split, these representations...
28 KB (4,066 words) - 01:55, 18 January 2025
algebraic torus (which is not necessarily compact, in contrast to a complex torus). A k-torus is a torus defined over k. The centralizer of a maximal torus is...
2 KB (244 words) - 12:15, 13 August 2023
torus Umbilic torus Genus-2 surface, also called "double torus" Maximal torus Clifford torus Torus palatinus, a bony growth on the palate Torus mandibularis...
2 KB (242 words) - 03:02, 10 March 2025
algebraically closed) field k {\displaystyle k} is the centralizer of a maximal torus. Cartan subgroups are smooth (equivalently reduced), connected and nilpotent...
3 KB (368 words) - 05:05, 26 July 2024
Orthogonal group (section Maximal tori and Weyl groups)
is the standard one-dimensional torus. In O(2n) and SO(2n), for every maximal torus, there is a basis on which the torus consists of the block-diagonal...
56 KB (7,881 words) - 20:44, 2 May 2025
that K contains a maximal torus of H, so has maximal rank. On the other hand, the centralizer of the subgroup generated by the torus S of elements exp...
52 KB (7,418 words) - 20:57, 10 January 2024
that K contains a maximal torus of G, so has maximal rank. On the other hand, the centralizer of the subgroup generated by the torus S of elements exp...
52 KB (7,216 words) - 14:30, 2 December 2022
Stated another way, a torus embedded in R3 is an asymmetric reduced-dimension projection of the maximally symmetric Clifford torus embedded in R4. The relationship...
13 KB (1,888 words) - 22:35, 8 May 2025
representations if and only if it has the same rank as a maximal compact subgroup K. In other words, a maximal torus T in K must be a Cartan subgroup in G. (This...
10 KB (1,366 words) - 21:06, 12 August 2023
group with maximal torus T. Hopf showed that the centralizer of a torus S ⊆ T is a connected closed subgroup containing T, so of maximal rank. Indeed...
23 KB (3,339 words) - 16:26, 13 April 2025
{\displaystyle W} is a Weyl group of G {\displaystyle G} corresponding to a maximal torus of B {\displaystyle B} . The Bruhat decomposition of G {\displaystyle...
5 KB (793 words) - 21:01, 12 February 2025
group E8 has dimension 248. Its rank, which is the dimension of its maximal torus, is eight. Therefore, the vectors of the root system are in eight-dimensional...
46 KB (6,100 words) - 13:08, 16 January 2025
characteristic 2 type, the width is usually the rank (the dimension of a maximal torus of the algebraic group). The quasithin groups were classified in a 1221-page...
4 KB (493 words) - 10:30, 16 January 2025
(n)=\mathrm {Sp} (2g,\mathbb {R} )\cap \mathrm {GL} (g,\mathbb {C} )} is the maximal torus. Since the isometry group of a symmetric space G / K {\displaystyle...
4 KB (692 words) - 07:46, 21 January 2025
orthogonal circles that do not twist around each other, and so form a maximal torus within the Lie group, corresponding to a collection of R mutually-commuting...
22 KB (2,339 words) - 17:54, 9 April 2025
Toric variety (redirect from Torus embedding)
variety or torus embedding is an algebraic variety containing an algebraic torus as an open dense subset, such that the action of the torus on itself extends...
16 KB (2,261 words) - 11:05, 16 May 2025
a maximal torus in the general linear group (and are their own centralizer), the generalized permutation matrices are the normalizer of this torus, and...
6 KB (899 words) - 21:04, 14 April 2025
homogeneous space. If G is a compact, connected Lie group, it contains a maximal torus T and the space G/T of left cosets with the quotient topology is a compact...
17 KB (2,475 words) - 19:58, 10 January 2024
Toral subalgebra (redirect from Maximal toral subalgebra)
semisimple element, say x; the linear span of x is then a toral subalgebra. Maximal torus, in the theory of Lie groups Humphreys 1972, Ch. II, § 8.1. Proof (from...
4 KB (504 words) - 18:56, 5 March 2023
uses the machinery of the maximal torus and the associated root system. Specifically, let T {\displaystyle T} be a maximal torus in a connected compact Lie...
53 KB (8,081 words) - 20:20, 18 May 2025