2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/49945We consider the derivatives which appear in the context of noncommutative string theory. First, we identify the correct derivations to use when the underlying structure of the theory is a quasitriangular Hopf algebra. Then we show that this is a specific case of a more general structure utilising the Drinfel'd twist. We go on to present reasons as to why we feel that the low-energy effective action, when written in terms of the original commuting coordinates, should explicitly exhibit this twisting.10 pages in LaTeX, no figures, uses `amssymb.sty', new references addedHigh Energy Physics - Theorytext