摘要
This paper analysis the local behavior of the bivariate quadratic function approximation to a bivariate function which has a given power series expansion about the origin. It is shown that the bivariate quadratic Hermite-Padé form always defines a bivariate quadratic function and that this function is analytic in a neighborhood of the origin.
基金
Supported by the NNSF of China(10271022, 60373093)
Supported by the Science and Technology Development Foundation of Education Department of Liaoning Province(2004C060)