Journal
PHYSICAL REVIEW B
Volume 71, Issue 11, Pages -Publisher
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevB.71.113102
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Hedin's equations are solved perturbatively in zero dimension to count Feynman graphs for self-energy, polarization, propagator, effective potential and vertex function in a many-body theory of fermions with two-body interaction. Counting numbers are also obtained in the GW approximation.
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