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Jim Stasheff pointed out a reference that discusses categorifications of associahedra. I added the ref to associahedron
Urs, this link at associahedron to the reference by Forcey you mentioned is currently broken.
Colin, with broken links, Google is your friend. Here it gives us this:
I have added an abstract description of (barycentrically subdivided) associahedra, in terms of a bar construction, to the definition section of associahedron. This is actually a definition, which wasn’t really there before.
Nice!
I added a pointer/short description of Loday’s concrete realization of the associahedron as a convex hull of integer coordinates. I wonder how it relates to the construction Todd gave above?
Good question. I believe Stefan Forcey has worked on bridging these sorts of abstract and concrete descriptions of polyhedra that arise in operadic combinatorics. You’re right that some effort to go into this should be entered at the nLab.
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