Can You Solve This K11B Equation Correctly?

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Homework Statement



http://img193.imageshack.us/img193/9933/k11b.jpg

Is this correct?
 
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No. Prove it to yourself that it isn't by taking the derivative of -e^(x^2)/(2x), and seeing if you get e-(x^2).
 
I will try. Thank you.
 
Thread 'Use greedy vertex coloring algorithm to prove the upper bound of χ'
Hi! I am struggling with the exercise I mentioned under "Homework statement". The exercise is about a specific "greedy vertex coloring algorithm". One definition (which matches what my book uses) can be found here: https://people.cs.uchicago.edu/~laci/HANDOUTS/greedycoloring.pdf Here is also a screenshot of the relevant parts of the linked PDF, i.e. the def. of the algorithm: Sadly I don't have much to show as far as a solution attempt goes, as I am stuck on how to proceed. I thought...

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