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Vanilla 1.1.10 is a product of Lussumo. More Information: Documentation, Community Support.
added statements of some basic properties to ribbon graph
added statements of relation to classifying spaces of mapping class groups to ribbon graphs
spelled out the definition more formally at ribbon graph
added pointer to survey in the context of weight systems on chord diagrams/Jacobi diagrams:
Added a link to ribbon category, but preferably one would say more. What is there to say?
Ribbon graphs are the free ribbon category, in the sense that there is a unique functor from the category of labeled ribbon graphs to your category that respects everything you want it to. (MO answer)
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