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Vlada [557]
3 years ago
14

Explain why there can't be a simple graph with the following sequence of vertex degrees: (a) 5,1,1,1

Mathematics
1 answer:
Contact [7]3 years ago
7 0

Answer:

a cant exist because 3 out of the 4 vertices must have only one degree vertex and the remaining one must have 5.

b) This example can be a single graph because of the handshaking lemma. The sum of the odd degrees vertex must be an even number: 3+3+5=11

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