Multivariate Padé approximants revisited. (English) Zbl 0622.65011

A general definition of multivariate Padé approximants is given which includes previous definitions of several authors as special cases. The coefficients of the polynomials in the numerator and the denominator of the Padé approximant are determined by a system of linear equations. A representation in terms of determinants is given. By considering suitable intermediate approximation problems, the multivariate Padé approximant can be calculated by a recursive algorithm.
Reviewer: R.Wegmann


65D15 Algorithms for approximation of functions
41A21 Padé approximation
41A63 Multidimensional problems
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