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S Dec 16, 2017 at 19:25 history suggested jeq CC BY-SA 3.0
Copied image to imgur.com, as it was not being displayed because of the new https rule. Added link to original image source.
Dec 16, 2017 at 15:13 review Suggested edits
S Dec 16, 2017 at 19:25
Jan 29, 2013 at 8:46 comment added Tim Porter Adding to Ronnie's comment on crossed n-cubes of groups. These are very very easy to define and give models for homotopy n+1-types. The corresponding n+1-groupoid will have a lot of seemingly extra structure whose details are not that clear once you get to n= 4. The reason, intuitively, is that the crossed n-cube lays things out for you, but at the cost of a lot of repetition of the information, while the n-category folds it all into a small space, so naturally things interact in an apparently more complex way.
Jan 28, 2013 at 17:12 comment added Ronnie Brown Thanks Vel. Corrected. (It weas on my computer but had not been copied over.)
Jan 28, 2013 at 16:46 vote accept Rachel
Jan 28, 2013 at 16:46 vote accept Rachel
Jan 28, 2013 at 16:46
Jan 28, 2013 at 16:26 comment added Vidit Nanda Ronnie, the link to the Advances paper returns a "not found" error.
Jan 28, 2013 at 15:35 history answered Ronnie Brown CC BY-SA 3.0