group theory
general linear group
unitary group
orthogonal group
symplectic group
finite group
symmetric group, cyclic group, braid group
classification of finite simple groups
sporadic finite simple groups
topological group
compact topological group, locally compact topological group
maximal compact subgroup
string group
Lie group
compact Lie group
Kac-Moody group
super Lie group
super Euclidean group
2-group
n-group
∞-group
simplicial group
crossed complex
k-tuply groupal n-groupoid
spectrum
circle n-group, string 2-group, fivebrane Lie 6-group
group cohomology
group extension,
∞-group extension, Ext-group
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