2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/55009We show that it is algebraically consistent to express some string field theory operators as inner derivations of the B-V algebra of string vertices. In this approach, the recursion relations for the string vertices are found to take the form of a `geometrical' quantum master equation. We also show that the B-V delta operator cannot be an inner derivation on the algebra.13 pages, phyzzxHigh Energy Physics - Theorytext