2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/76560This note consists of two parts. Part I is an exposition of (a part of) the V.Drinfeld's letter, [D]. The sheaf of algebras of polyvector fields on a Calabi-Yau manifold, equipped with the Schouten bracket, admits a structure of a Batalin-Vilkovisky algebra. This fact was probably first noticed by Z.Ran, [R]. Part II is devoted to some generalizations of this remark.29 pages, TeX. Minor changes made, and a reference addedAlgebraic Geometrytext