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2-category 2-category-theory abelian-categories adjoint algebra algebraic algebraic-geometry algebraic-topology analysis analytic-geometry arithmetic arithmetic-geometry book bundles calculus categorical categories category category-theory chern-weil-theory cohesion cohesive-homotopy-type-theory cohomology colimits combinatorics complex complex-geometry computable-mathematics computer-science constructive cosmology deformation-theory descent diagrams differential differential-cohomology differential-equations differential-geometry digraphs duality elliptic-cohomology enriched fibration foundation foundations functional-analysis functor gauge-theory gebra geometric-quantization geometry graph graphs gravity grothendieck group group-theory harmonic-analysis higher higher-algebra higher-category-theory higher-differential-geometry higher-geometry higher-lie-theory higher-topos-theory homological homological-algebra homotopy homotopy-theory homotopy-type-theory index-theory integration integration-theory internal-categories k-theory lie-theory limits linear linear-algebra locale localization logic mathematics measure measure-theory modal modal-logic model model-category-theory monad monads monoidal monoidal-category-theory morphism motives motivic-cohomology nlab noncommutative noncommutative-geometry number-theory of operads operator operator-algebra order-theory pages pasting philosophy physics pro-object probability probability-theory quantization quantum quantum-field quantum-field-theory quantum-mechanics quantum-physics quantum-theory question representation representation-theory riemannian-geometry scheme schemes set set-theory sheaf simplicial space spin-geometry stable-homotopy-theory stack string string-theory superalgebra supergeometry svg symplectic-geometry synthetic-differential-geometry terminology theory topology topos topos-theory tqft type type-theory universal variational-calculus

1. • CommentRowNumber1.
   • CommentAuthorUrs
   • CommentTimeDec 7th 2018
   • PermaLink
   Author: Urs
   Format: MarkdownItexa stub, trying to bring in infrastructure for discussion of the finite subgroups of $O(5)$ <a href="https://ncatlab.org/nlab/revision/24-cell/1">v1</a>, <a href="https://ncatlab.org/nlab/show/24-cell">current</a>

   a stub, trying to bring in infrastructure for discussion of the finite subgroups of $O(5)$

   v1, current

2. • CommentRowNumber2.
   • CommentAuthorBlake Stacey
   • CommentTimeOct 10th 2021
   • PermaLink
   Author: Blake Stacey
   Format: MarkdownItexlink <a href="https://ncatlab.org/nlab/revision/diff/24-cell/3">diff</a>, <a href="https://ncatlab.org/nlab/revision/24-cell/3">v3</a>, <a href="https://ncatlab.org/nlab/show/24-cell">current</a>

   link

   diff, v3, current

3. • CommentRowNumber3.
   • CommentAuthorUrs
   • CommentTimeOct 11th 2021
   • PermaLink
   Author: Urs
   Format: MarkdownItexThanks for creating the new entry *[[24]]*. That looks good. There seems to be some bug at work in the discussion thread of the same title [here](https://nforum.ncatlab.org/discussion/13575/24/#Item_1), as it's not showing its content. Maybe Richard sees [this](https://nforum.ncatlab.org/discussion/10105/bugs-and-feature-requests/?Focus=95923#Comment_95923) and sees how to fix it. Otherwise we could work around it by discussing here: I just did some minor edits to your entry, such as showing the "many integer factors" of 24 (maybe this needs to go with a comparison to the factors of 10 in order to be appreciable by readers who hear it the first time), adding a DOI-link to Gannon's book reference and adding hyperlinks to some more keywords, here and there.

   Thanks for creating the new entry 24. That looks good.

   There seems to be some bug at work in the discussion thread of the same title here, as it’s not showing its content. Maybe Richard sees this and sees how to fix it. Otherwise we could work around it by discussing here:

   I just did some minor edits to your entry, such as showing the “many integer factors” of 24 (maybe this needs to go with a comparison to the factors of 10 in order to be appreciable by readers who hear it the first time), adding a DOI-link to Gannon’s book reference and adding hyperlinks to some more keywords, here and there.