What is the condition in unbounded oprerators?

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Homework Statement


T1, T2 and T3 are unbounded operators.
p_221jef11.png

What is this condition?
http://T[SUB]1[/SUB]

3. The Attempt at a Solution [/B]
T2 is the identity operator and D(T3)⊂D(T1) / D is the domain of definition.
 
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smati said:

Homework Statement


T1, T2 and T3 are unbounded operators.
p_221jef11.png

What is this condition?
http://T[SUB]1[/SUB]

3. The Attempt at a Solution [/B]
https://scontent-mrs1-1.xx.fbcdn.net/t31.0-8/13958240_283354382042877_6744203050697608959_o.jpg
 
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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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