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Mar 2, 2012 at 15:07 comment added some guy on the street ahah! This will bear some thinking about. Tom, it's at least in $Top$-like things, which is (again) one of the likenesses I'm trying to get at; in this case, it seems to be the fact that ordinary pull-backs are subspaces of products in a very clean way.
Mar 2, 2012 at 14:29 comment added Tom Goodwillie That's in the category of simplicial sets, or what?
Mar 2, 2012 at 14:23 history answered Jeff Strom CC BY-SA 3.0