Ore principal subresultant coefficients in solutions

The principal subresultant coefficients of polynomials play a fundamental r ole in elimination theory and computer algebra. Recently they have been ext ended to Ore polynomials. They are defined by an expression in the coeffici ents of Ore polynomials. In this paper, we provide another expression for t hem. This expression is written in terms of the "solutions" of Ore polynomi als (in "generic" case). It can be viewed as a generalization of the well k nown expression for resultants of two commutative polynomials: the product of the pair-wise differences of their roots.