A type of matrix Padé approximant inspired by scalar component models

  • Authors:
  • Celina Pestano-Gabino;Concepción González-Concepción;María Candelaria Gil-Fariña

  • Affiliations:
  • -;-;-

  • Venue:
  • Journal of Computational and Applied Mathematics
  • Year:
  • 2012

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Abstract

In this paper we define a type of matrix Pade approximant inspired by the identification stage of multivariate time series models considering scalar component models. Of course, the formalization of certain properties in the matrix Pade approximation framework can be applied to time series models and in other fields. Specifically, we want to study matrix Pade approximants as follows: to find rational representations (or rational approximations) of a matrix formal power series, with both matrix polynomials, numerator and denominator, satisfying three conditions: (a) minimum row degrees for the numerator and denominator, (b) an invertible denominator at the origin, and (c) canonical representation (without free parameters).