2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/124753In contrast with differential operators on modules over commutative and graded commutative rings, there is no satisfactory notion of a differential operator in noncommutative geometry.17 pagesQuantum AlgebraHigh Energy Physics - TheoryMathematical Physics81T75; 58J42A dilemma of nonequivalent definitions of differential operators in noncommutative geometrytext