On an identity for the volume integral of the square of a vector field. Remark on a paper by A. M. Stewart

2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/119603Stewart has presented a position-space derivation of the identity for the volume integral of a product of two vector fields noted by Gubarev, Stodolsky, and Zakharov, and applied the results to classical electromagnetic theory. I present a simplified derivation suitable for use in undergraduate courses.3 pagesPhysics EducationGeneral PhysicsOn an identity for the volume integral of the square of a vector field. Remark on a paper by A. M. Stewarttext