Abstract
In [DG 891, the authors show that many results concerning the problem of efficient interpolation of k-sparse multivariate polynomials can be formulated and proved in the general setting of k-sparse sums of charac- ters of abelian monoids. In this note we describe another conceptual framework for the interpolation problem. In this framework, we consider R-algebras of functions &i, . . . , &” on an integral domain
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