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Are these two digraphs isomorphic?
Surround Sound Systems
Audio systems designed to create a more immersive listening experience by using multiple speakers placed around the listener to replicate a multi-dimensional sound environment.
Monopoly
A market structure characterized by a single seller controlling all supply of a good or service, with no close substitutes.
Marginal Revenue
The incremental revenue earned by selling one more unit of a good or service.
Prices
The financial requirement for buying a good, service, or asset.
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