Spin problem

Answers and Replies

  • #2
DrDu
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An even vertex is a vertex whose order is an even number (2 or 4). Yes, the spin products in Fig. 6.13 all vanish according to the definition.
 
  • #3
687
17
And what is with ##\upsilon^0## term? Is that like vacum?
 
  • #4
DrDu
Science Advisor
6,210
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And what is with ##\upsilon^0## term? Is that like vacum?

What's the problem with it? You want to have the system to have a partition function in the case J=0, too, don't you?
 
  • #5
687
17
Yes. Tnx.
 

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