J. Aust. Math. Soc.
77 (2004), 111122  
You can see the arrows in a quiver operator algebra
 
 
Abstract  
We prove that two quiver operator algebras can
be isometrically isomorphic only if the quivers
( = directed graphs) are isomorphic. We also show
how the graph can be recovered from certain
representations of the algebra.
 
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