ADVANCES IN THEORETICAL AND MATHEMATICAL PHYSICS, v.21, no.8, pp.1953 - 1989
INT PRESS BOSTON, INC
The c(2) invariants in all 4 different representations of the Feynman period (parametric and dual parametric representations, position and momentum spaces) coincide for all log-divergent graphs that satisfy the condition called duality admissibility. We check this condition for a good subspace of graphs with certain combinatorial properties, for instance, for all planar graphs. After the result in , the coincidence holds for all physically relevant graphs.
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