Pimentel, B. M.Tomazelli, J. L.2014-05-202014-05-201995-06-01Progress of Theoretical Physics. Kyoto: Kyoto Univ, v. 93, n. 6, p. 1105-1112, 1995.0033-068Xhttp://hdl.handle.net/11449/37069Starting from linear equations for the complex scalar field, the two- and three-point Green's functions are obtained in the infrared approximation. We show that the infrared singularity factorizes in the vertex function as in spinor QED, reproducing in a simple and straightforward way the result of lengthy perturbative calculations.1105-1112engArtigo10.1143/ptp/93.6.1105WOS:A1995RG78900009Acesso restrito