2007/10/22 by Ralph M. Kaufmann, Kaufmann, Ralph M., Rachel Schwell +1
Mathematics · #Algebraic Topology (math.AT) #FOS: Mathematics #Quantum Algebra (math.QA) #math.AT #math.QA
paper · pdf · doi:10.48550/arxiv.0710.3967
36 pages, 12 figures
arxiv created 2007/10/22 · arxiv updated 2009/12/01
We give a topological solution to the \Ainf Deligne conjecture using associahedra and cyclohedra. For this we construct three CW complexes whose cells are indexed by products of polytopes. Giving new explicit realizations of the polytopes in terms of different types of trees, we are able to show that the CW complexes are cell models for the little discs. The cellular chains of one complex in particular, which is built out of associahedra and cyclohedra, naturally acts on the Hochschild cochains of an \Ainf algebra yielding an explicit, topological and minimal solution to the \Ainf Deligne conjecture. Along the way we obtain new results about the cyclohedra, such as a new decompositions into products of cubes and simplices, which can be used to realize them via a new iterated blow--up construction.