Open AccessA rational interaction: Lower bound on the number of I-PI graphs without tadpoles
Author(s) -
G. A. T. F. DaCosta
Publication year - 1991
Publication title -
journal of mathematical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.708
H-Index - 119
eISSN - 1089-7658
pISSN - 0022-2488
DOI - 10.1063/1.529514
Subject(s) - pi , upper and lower bounds , mathematics , divergence (linguistics) , rational number , combinatorics , discrete mathematics , mathematical analysis , geometry , philosophy , linguistics
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
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