2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/50361In this short note we would like to show the relation between the cubic string field theory for N D-instantons and the string field theory in the presence of the background B field.23 pages, Revised paper, new proofs of the properties of BRST operator included, relation with cubic string field theory discussed, reference addedHigh Energy Physics - Theorytext