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Graphs and hypercubes
Dear Theo : Yes, there is. I said to you that I am in a category, so every pair of arrows in the hypercubes is composable. For example, you can put the diagram (sorry, I use xymatrix syntax since diagrams in latex are not working in any case, and I am not used to them) X \ar[r]^f \ar[dr]^{gf} & Y \ar[d]^g \\ & Z on the square X \ar[r]^f \ar[dr]^{gf} \ar[d]_f & Y \ar[d]^g \\ Y \ar[r]_g & Z . Dear Andre' : embedding means a functor from I to some hypercube $C_n$ (hypercubes live in an additive category C). |
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