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#1 2013-08-15 00:20:58
- dee93
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- Registered: 2013-08-12
- Posts: 19
Which of the following graphs are Eulerian and which are Hamiltonian?
Would I be right in saying that the first and second graphs are Hamiltonian and the third is Eulerian,unsure about the 4th?
Last edited by dee93 (2013-08-15 00:31:10)
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#2 2013-08-15 00:39:03
Re: Which of the following graphs are Eulerian and which are Hamiltonian?
fourth is eulerian too
'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.'
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#3 2013-08-15 01:00:26
- dee93
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- Registered: 2013-08-12
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Re: Which of the following graphs are Eulerian and which are Hamiltonian?
fourth is eulerian too
thanks so i am correct with the others?
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#4 2013-08-15 01:06:00
- Bob
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- Registered: 2010-06-20
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Re: Which of the following graphs are Eulerian and which are Hamiltonian?
I'm looking now. First is H but not E
More ....
Bob
Children are not defined by school ...........The Fonz
You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you! …………….Bob 
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#5 2013-08-15 01:16:34
- Bob
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Re: Which of the following graphs are Eulerian and which are Hamiltonian?
Note: It is possible to be both eg. Four vertices connected as a square.
Second is not H and is E
Don't see how this is H? The middle vertex must be visited twice and three times if it is the start/finish.
Third is H but not E
Fourth is not H and is E
Bob
Children are not defined by school ...........The Fonz
You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you! …………….Bob
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