Question

A subset of roots whose mutual angles agree with those of a simple system

score 470 · Answer 1 · 2015-09-30 10:57:52

470

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A subset of roots whose mutual angles agree with those of a simple system

Published on 30 Sep 2015 - 10:57

score 25 · Answer 2 · 2015-10-21 04:24:11

25

Views

Generating set of Coxeter group from a $(B,N)$-pair?

Published on 21 Oct 2015 - 4:24

score 482 · Answer 3 · 2026-03-10 12:14:53

482

Views

Coxeter presentation of Hyperoctahedral group $(\mathbb{Z}/2\mathbb{Z})^n \rtimes S_n$.

Published on 10 Mar 2026 - 12:14

score 193 · Answer 4 · 2026-03-13 07:41:40

193

Views

Intersection of halfspaces and hyperplanes

Published on 13 Mar 2026 - 7:41

score 318 · Answer 5 · 2026-03-23 10:13:19

318

Views

Mapping $\Delta(2,2,2)\mapsto \Delta(4,4,2)$...

Published on 23 Mar 2026 - 10:13

score 395 · Answer 6 · 2016-02-03 22:55:23

395

Views

On groups with presentations $ \langle a,b,c\mid a^2=b^2=c^2=(ab)^p=(bc)^q=(ca)^r=(abc)^s=1\rangle $...

Published on 03 Feb 2016 - 22:55

score 1.1k · Answer 7 · 2016-02-22 07:45:53

1.1k

Views

What is the longest element of $S_n$ as a product of adjacent transpositions?

Published on 22 Feb 2016 - 7:45

score 256 · Answer 8 · 2016-02-24 01:04:31

256

Views

Is there a quick way to find the longest element of a subgroup of a Weyl group?

Published on 24 Feb 2016 - 1:04

score 260 · Answer 9 · 2026-03-13 02:28:31

260

Views

If $P_I$ is a parabolic subgroup in $GL_n(k)$, is $P_I$ conjugate to ${P_I}^-$ under some element of $W$?

Published on 13 Mar 2026 - 2:28

score 405 · Answer 10 · 2016-03-21 14:14:59

405

Views

Relation between reflection group and coxeter group

Published on 21 Mar 2016 - 14:14

score 734 · Answer 11 · 2016-03-21 23:59:42

734

Views

In a reflection group, the longest word $w_0$ contains all simple reflections

Published on 21 Mar 2016 - 23:59

score 52 · Answer 12 · 2026-03-25 16:21:07

52

Views

Is a Coxeter group W operating on a finite set X also finite?

Published on 25 Mar 2026 - 16:21

score 378 · Answer 13 · 2016-04-10 00:55:03

378

Views

How does the Weyl group act on the root system of type $B_n$?

Published on 10 Apr 2016 - 0:55

score 120 · Answer 14 · 2016-04-17 10:05:42

120

Views

Order of parabolic subgroups of affine Weyl groups

Published on 17 Apr 2016 - 10:05

score 161 · Answer 15 · 2016-04-22 06:25:28

161

Views

Geometric interpretation of length function of a coxeter group

Published on 22 Apr 2016 - 6:25

List Question

A subset of roots whose mutual angles agree with those of a simple system

Generating set of Coxeter group from a $(B,N)$-pair?

Coxeter presentation of Hyperoctahedral group $(\mathbb{Z}/2\mathbb{Z})^n \rtimes S_n$.

Intersection of halfspaces and hyperplanes

Mapping $\Delta(2,2,2)\mapsto \Delta(4,4,2)$...

On groups with presentations $ \langle a,b,c\mid a^2=b^2=c^2=(ab)^p=(bc)^q=(ca)^r=(abc)^s=1\rangle $...

What is the longest element of $S_n$ as a product of adjacent transpositions?

Is there a quick way to find the longest element of a subgroup of a Weyl group?

If $P_I$ is a parabolic subgroup in $GL_n(k)$, is $P_I$ conjugate to ${P_I}^-$ under some element of $W$?

Relation between reflection group and coxeter group

In a reflection group, the longest word $w_0$ contains all simple reflections

Is a Coxeter group W operating on a finite set X also finite?

How does the Weyl group act on the root system of type $B_n$?

Order of parabolic subgroups of affine Weyl groups

Geometric interpretation of length function of a coxeter group

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