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Mar 11, 2010 at 16:58 comment added Hans-Peter Stricker What do you think: May I change my question to "Which finite graphs may be represented...?"
Mar 11, 2010 at 16:34 comment added Thomas Bloom This argument can be extended to show the same for any tree (on at least three vertices). Might it still be possible for an interesting subclass of graphs? (e.g. graphs containing cycles, or graphs with complete components.)
Mar 11, 2010 at 16:09 vote accept Hans-Peter Stricker
Mar 11, 2010 at 16:03 history answered Kevin Buzzard CC BY-SA 2.5