Question

Example of a discrete uniform subgroup of a Lie group which is not virtually torsion-free

score 392 · Answer 1 · 2026-03-25 20:36:43

392

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Example of a discrete uniform subgroup of a Lie group which is not virtually torsion-free

Published on 25 Mar 2026 - 20:36

score 75 · Answer 2 · 2026-03-25 22:10:55

75

Views

Discrete commutative subgroups of Euclidean isometries form lattice

Published on 25 Mar 2026 - 22:10

score 74 · Answer 3 · 2026-03-25 22:04:38

74

Views

Covolume of $PSL(2,\mathbb{Z})$ in $PSL(2,\mathbb{Q}_p)$

Published on 25 Mar 2026 - 22:04

score 69 · Answer 4 · 2026-03-26 01:29:02

69

Views

Co-compact lattice in locally compact hausdorff groups

Published on 26 Mar 2026 - 1:29

score 52 · Answer 5 · 2026-03-25 22:06:33

52

Views

How does the action of $GL(n,\mathbb R)$ affect the $k$-th minimum of a lattice?

Published on 25 Mar 2026 - 22:06

score 23 · Answer 6 · 2026-03-26 01:06:12

23

Views

How does $g\in GL(n,\mathbb R)$ affect the ratio $\lambda_i(gL)/\lambda_i(L)$ of a lattice $L$

Published on 26 Mar 2026 - 1:06

score 400 · Answer 7 · 2026-04-13 02:43:08

400

Views

Haar measure of $\operatorname{SL}_n(\mathbb{R})$ in terms of the product $K\times A\times N$

Published on 13 Apr 2026 - 2:43

score 140 · Answer 8 · 2026-03-25 20:35:55

140

Views

Why $\mathbb Z(\sqrt2)$ is not a lattice?

Published on 25 Mar 2026 - 20:35

score 40 · Answer 9 · 2026-05-10 17:38:40

40

Views

How to find rational elements of order 3 in the Lie group $A_2$

Published on 10 May 2026 - 17:38

score 1.1k · Answer 10 · 2026-05-10 17:39:03

1.1k

Views

Properties of the Weyl vector $\rho = \frac{1}{2} \sum_{\alpha > 0} \alpha$

Published on 10 May 2026 - 17:39

score 335 · Answer 11 · 2026-03-25 22:03:26

335

Views

Example 15.9 in Loring Tu's An Introduction to manifolds

Published on 25 Mar 2026 - 22:03

score 322 · Answer 12 · 2026-03-25 20:42:25

322

Views

Verifying some facts about finite-volume hyperbolic manifolds

Published on 25 Mar 2026 - 20:42

score 33 · Answer 13 · 2026-03-25 23:36:10

33

Views

Finding the closest point in a root lattice

Published on 25 Mar 2026 - 23:36

score 47 · Answer 14 · 2026-04-12 13:09:52

47

Views

Does the product of two Schur functions always have a lattice structure with respect to the dominance order of partitions?

Published on 12 Apr 2026 - 13:09

score 54 · Answer 15 · 2026-03-26 01:12:42

54

Views

Understanding $X_n = \big\{ \text{lattices } Λ < \Bbb R^n: \operatorname{covol} Λ = 1\big\} \cong SL(n, \Bbb Z) \setminus SL(n, \Bbb R)$

Published on 26 Mar 2026 - 1:12

List Question

Example of a discrete uniform subgroup of a Lie group which is not virtually torsion-free

Discrete commutative subgroups of Euclidean isometries form lattice

Covolume of $PSL(2,\mathbb{Z})$ in $PSL(2,\mathbb{Q}_p)$

Co-compact lattice in locally compact hausdorff groups

How does the action of $GL(n,\mathbb R)$ affect the $k$-th minimum of a lattice?

How does $g\in GL(n,\mathbb R)$ affect the ratio $\lambda_i(gL)/\lambda_i(L)$ of a lattice $L$

Haar measure of $\operatorname{SL}_n(\mathbb{R})$ in terms of the product $K\times A\times N$

Why $\mathbb Z(\sqrt2)$ is not a lattice?

How to find rational elements of order 3 in the Lie group $A_2$

Properties of the Weyl vector $\rho = \frac{1}{2} \sum_{\alpha > 0} \alpha$

Example 15.9 in Loring Tu's An Introduction to manifolds

Verifying some facts about finite-volume hyperbolic manifolds

Finding the closest point in a root lattice

Does the product of two Schur functions always have a lattice structure with respect to the dominance order of partitions?

Understanding $X_n = \big\{ \text{lattices } Λ < \Bbb R^n: \operatorname{covol} Λ = 1\big\} \cong SL(n, \Bbb Z) \setminus SL(n, \Bbb R)$

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