Nakanishi, Noboru.
Parametric integral formulas and analytic properties in perturbation theory / Noboru Nakanishi. Wightman functions, retarded functions and their analytic continuations / Huzihiro Araki.
Perturbation (Mathematics)
Quantum field theory.
Analytic functions.
Araki, Huzihiro. Wightman functions, retarded functions and their analytic continuations.
Wightman functions, retarded functions and their analytic continuations.
Retarded functions and their analytic continuations.