2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/58791The explicit realization of M. Kontsevich's formality on $R^d$ is the main step of the proof of formality theorem on any manifold. We present here a coherent choice of orientations and signs in order to write completely M. Kontsevich's proof for $R^d$, including all the signs appearing in the formality equation.34 pages, plain TeX, 6 epsf figures, written in FrenchQuantum Algebra53D55text