Background
Basic concepts
equivalences in/of $(\infty,1)$-categories
Universal constructions
Local presentation
Theorems
Extra stuff, structure, properties
Models
An ∞-group is a group object in ∞Grpd.
Equivalently (by the delooping hypothesis) it is a pointed connected $\infty$-groupoid.
Under the identification of ∞Grpd with Top this is known as a grouplike $A_\infty$-space, for instance.
An $\infty$-Lie group is accordingly a group object in ∞-Lie groupoids. And so on.
For details see groupoid object in an (∞,1)-category.
By
$\infty$-group, braided ∞-group
(For more see also the references at infinity-action.)
A standard textbook reference on $\infty$-groups in the classical model structure on simplicial sets is
Group objects in (infinity,1)-categories are the topic of
Model category presentations of group(oid) objects in $\infty Grpd$ by groupoidal complete Segal spaces are discussed in
Adding inverses to diagrams encoding algebraic structures, Homology, Homotopy and Applications 10 (2008), no. 2, 149–174. (arXiv:0610291)
Adding inverses to diagrams II: Invertible homotopy theories are spaces, Homology, Homotopy and Applications, Vol. 10 (2008), No. 2, pp.175-193. (web, arXiv:0710.2254)
Discussion from the point of view of category objects in an (∞,1)-category is in
The homotopy theory of $\infty$-groups that are n-connected and r-truncated for $n \leq r$ is discussed in
/S0022-4049(98)00143-1“>doi:10.1016/S0022-4049(98)00143-1</a>)
Discussion of aspects of ordinary group theory in relation to $\infty$-group theory:
Discussion of $\infty$-groups in homotopy type theory:
Ulrik Buchholtz, Floris van Doorn, Egbert Rijke, Higher Groups in Homotopy Type Theory, LICS ‘18: Proceedings of the 33rd Annual ACM/IEEE Symposium on Logic in Computer Science (arXiv:1802.04315, doi:10.1145/3209108.3209150)
Ulrik Buchholtz, Notes on higher groups and projective spaces, 2016 (pdf)
Marc Bezem, Ulrik Buchholtz, Pierre Cagne, Bjørn Ian Dundas, Daniel R. Grayson: Section 4.6 of: Symmetry (2021) $[$pdf$]$
Last revised on June 24, 2022 at 16:55:00. See the history of this page for a list of all contributions to it.