Mathematics – Geometric Topology
Scientific paper
2007-08-20
Mathematics
Geometric Topology
77 pages
Scientific paper
We introduce the notion of a positive face structure. The positive face structures to positive-to-one computads are like simple graphs, to free omega-categories over omega-graphs. In particular, they allow to give an explicit combinatorial description of positive-to-one computads. Using this description we show, among other things, that positive-to-one computads form a presheaf category with the exponent category being the category of principal positive face structures. We also present the Harnik argument in this context showing that the omega-categories are monadic over positive-to-one computads with the 'free functor' being the inclusion.
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