D1 - edge sets Watch

Revelation
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#1
Report Thread starter 12 years ago
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Simple question, maybe im being too picky but. Say I have the graph:

B ---->----- A

would the edge set be {AB} or {BA}

does it even matter?
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Aitch
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(Original post by Revelation)
Simple question, maybe im being too picky but. Say I have the graph:

B ---->----- A

would the edge set be {AB} or {BA}

does it even matter?
(Depending on which syllabus you're doing), arc is often used for a directed edge (the AQA text for example, does this). I would refer to this arc, since a directed edge, as BA, to indicate the direction.
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Christophicus
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(Original post by Revelation)
Simple question, maybe im being too picky but. Say I have the graph:

B ---->----- A

would the edge set be {AB} or {BA}

does it even matter?
As it's a digraph, I'd say BA.
It depends on the syllabus.
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Revelation
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edexcel, if i use {BA} etc. I can't go wrong.. I hope
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Aitch
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(Original post by Revelation)
edexcel, if i use {BA} etc. I can't go wrong.. I hope
Correct! You will also always be aware yourself, as you are working, of the direction of the arc, if you stick to this habit.

Aitch
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