A review of multivariate Pad6 approximation theory
نویسنده
چکیده
In the past decade a lot of work has been done on the subject of multivariate Pad6 approximation theory and so it would be interesting to compare some different definitions. Let us first take a look at the univariate case. It is well known that univariate Pad6 approximants can be obtained in several equivalent ways and that they satisfy some typical properties. We will briefly repeat the definition together with these characteristic properties and indicate some of the methods to calculate them. Consider a real-valued function f of one real variable x given by its Taylor series expansion at the origin
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