2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/60537We prove the 0-(co)homology part of the conjecture on the cup-products on tangent cohomology in the Tsygan formality [Sh2]. We discuss its applications to the Duflo formula.12 pages, 6 eps figuresQuantum AlgebraMathematical PhysicsK-Theory and Homology53D55, 18G55text