# Do the terms “quiver” and “meta graph” refer to the same concept?

Do the terms "quiver" and "metagraph" refer to the same concept? Or is there a distinction I am missing.

My sources are

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I don't understand what you mean by the functional/structural opposition; the axioms of groups (or whatever) are they functional or structural? Can you list the axioms of metagraphs, or quivers? The metagraph link given is particularly unhelpful, it only makes negative claims; as far as I can see it set up a language, with no axioms. But for one thing, according to your quiver link, you can talk about the set of vertices of a quiver $G:X\to\mathrm{Set}$ (slick definition), it is the object $G(X_0)$ of the category Set, manifestly a set. The metagraph link explicitly says the contrary. –  Marc van Leeuwen Aug 20 '12 at 6:23