A rational interaction: Lower bound on the number of I-PI graphs without tadpoles. (English) Zbl 0728.05057
Summary: A lower bound on the number of I-PI connected graphs without tadpoles that will be important in the proof of the divergence of the perturbation series of a model with rational interaction is obtained.
References:
| [1] | DOI: 10.1063/1.528366 · Zbl 0775.33002 · doi:10.1063/1.528366 |
| [2] | DOI: 10.1007/BF01646496 · Zbl 0127.19706 · doi:10.1007/BF01646496 |
| [3] | DOI: 10.1007/BF01947072 · doi:10.1007/BF01947072 |
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