2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/56296Effects of fermion-vacuum polarization by a singular configuration of an external static vector field are considered in (2 + 1)-dimensional spacetime. Expressions for the induced vacuum charge and magnetic flux are obtained.19 pages, LaTex, 1 figuresHigh Energy Physics - Theorytext