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15
Math.TechQA.Club
2026-03-26 22:54:13
1.3k
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Projection onto the tangent spaces of $O(n)$
Published on
26 Mar 2026 - 22:54
#lie-groups
#riemannian-geometry
#smooth-manifolds
#matrix-calculus
#orthogonal-matrices
262
Views
Covariant derivative on the base space
Published on
25 Mar 2026 - 14:21
#differential-geometry
#lie-groups
#lie-algebras
#fiber-bundles
#principal-bundles
742
Views
$O(3)/SO(3) \cong \mathbb{Z}_2$
Published on
13 Oct 2019 - 21:11
#group-theory
#representation-theory
#lie-groups
81
Views
Lorentz algebra elements
Published on
13 Oct 2019 - 22:27
#lie-groups
#lie-algebras
143
Views
Is SO(n) a deformation retract of SO(n+1) for $n\ge 3$?
Published on
27 Mar 2026 - 1:46
#general-topology
#algebraic-topology
#lie-groups
#topological-groups
433
Views
Proving a discrete normal subgroup of a connected group must be contained in the center
Published on
14 Oct 2019 - 13:55
#group-theory
#lie-groups
67
Views
Flow of vector field $V_p = \frac{d}{dt} \left|_{t=0} \right. \ p \cdot e^{2\pi it}$ on a manifold $M$ with an $S^1$-action
Published on
28 Mar 2026 - 14:44
#differential-geometry
#lie-groups
#vector-fields
63
Views
Bruhat decomposition basic question
Published on
15 Oct 2019 - 17:10
#group-theory
#lie-groups
711
Views
Given Cartan matrix, find root and Dynkin diagram
Published on
27 Mar 2026 - 1:46
#lie-groups
#root-systems
#dynkin-diagrams
148
Views
A representation induced from one subgroup and restricted to another
Published on
16 Oct 2019 - 18:47
#group-theory
#representation-theory
#lie-groups
103
Views
What is the relation between Lie algebra/ group and formal group laws
Published on
02 Apr 2026 - 6:28
#lie-groups
#lie-algebras
#formal-groups
65
Views
local homeomorphism between $\mathfrak{so}(n)$ and $SO(n)$
Published on
18 Oct 2019 - 2:40
#lie-groups
#lie-algebras
#smooth-manifolds
721
Views
Center of SU(3)
Published on
29 Mar 2026 - 21:53
#group-theory
#lie-groups
#abelian-groups
534
Views
Quaternions and $SU(2)$
Published on
02 Apr 2026 - 18:21
#lie-groups
#quaternions
#orthogonal-matrices
#unitary-matrices
#linear-groups
221
Views
Matrix form of $SU(2)\times SU(2)$ acting on the Quaternions
Published on
19 Oct 2019 - 9:55
#lie-groups
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