A new matrix Padé-type approximant (MPTA) is defined in the paper by introducing a generalized linear functional in the inner product space. The expressions of MPTA are provided with the generating function form and the determinant form. Moreover, a directional matrix Padé approximant is also established by giving a set of linearly independent matrices. In the end, it is shown that the method of MPTA can be applied to the reduction problems of the high degree multivariable linear system. © 2003 Elsevier B.V. All rights reserved.
Gu, C. (2004). Matrix Padé-type approximant and directional matrix Padé approximant in the inner product space. Journal of Computational and Applied Mathematics, 164–165, 365–385. https://doi.org/10.1016/S0377-0427(03)00487-4