In this paper, a new kind of bivariate vector valued rational interpolants is recursively established by means of Samelson inverse, with scalar numerator and vector valued denominator. It is essentially different from...In this paper, a new kind of bivariate vector valued rational interpolants is recursively established by means of Samelson inverse, with scalar numerator and vector valued denominator. It is essentially different from that of Zhu Gong-qin and Gu Chuan-qing (1990) where the interpolants are constructed by Thiele-type continued fractions with vector valued numerator and scalar denominator. The new approach is more suitable to calculate the value of a vector valued function for a given point.展开更多
A new kind of matrix-valued rational interpolants is recursively established by means of generalized Samelson inverse for matrices, with scalar numerator and matrix-valued denominator. In this respect, it is essential...A new kind of matrix-valued rational interpolants is recursively established by means of generalized Samelson inverse for matrices, with scalar numerator and matrix-valued denominator. In this respect, it is essentially different from that of the previous works [7, 9], where the matrix-valued rational interpolants is in Thiele-type continued fraction form with matrix-valued numerator and scalar denominator. For both univariate and bivariate cases, sufficient conditions for existence, characterisation and uniqueness in some sense are proved respectively, and an error formula for the univariate interpolating function is also given. The results obtained in this paper are illustrated with some numerical examples.展开更多
A new kind of vector valued rational interpolants is established by means of Samelson inverse, with scalar numerator and vector valued denominator. It is essen tially different from that of Graves-Morris(1983), where ...A new kind of vector valued rational interpolants is established by means of Samelson inverse, with scalar numerator and vector valued denominator. It is essen tially different from that of Graves-Morris(1983), where the interpolants are constructed by Thiele-type continued fractions with vector valued numerator and scalar denominator. The new approach is more suitable to calculate the value of a vector valued function for a given point. And an error formula is also given and proven.展开更多
A new kind of bivariate vector-valued rational interpolants is recursively estab- lished by means of Samelson inverse over rectangular grids, with scalar numerator and vector-valued denominator. In this respect, it is...A new kind of bivariate vector-valued rational interpolants is recursively estab- lished by means of Samelson inverse over rectangular grids, with scalar numerator and vector-valued denominator. In this respect, it is essentially different from that of the previous work. Sufficient conditions for existence, characterization and uniqueness in some sense are proved respectively. And the resluts in the paper are illustrated with some numerical examples.展开更多
In [3], a kind of matrix-valued rational interpolants (MRIs) in the form of Rn(x) = M(x)/D(x) with the divisibility condition D(x) | ‖M(x)‖2, was defined, and the characterization theorem and uniqueness theorem for ...In [3], a kind of matrix-valued rational interpolants (MRIs) in the form of Rn(x) = M(x)/D(x) with the divisibility condition D(x) | ‖M(x)‖2, was defined, and the characterization theorem and uniqueness theorem for MRIs were proved. However this divisibility condition is found not necessary in some cases. In this paper, we remove this restricted condition, define the generalized matrix-valued rational interpolants (GMRIs) and establish the characterization theorem and uniqueness theorem for GMRIs. One can see that the characterization theorem and uniqueness theorem for MRIs are the special cases of those for GMRIs. Moreover, by defining a kind of inner product,we succeed in unifying the Samelson inverses for a vector and a matrix.展开更多
文献[1]应用Lwner与Hankel矩阵解法得出一般有理插值问题的McMillan次数小于插值点个数N(含重数)的所有真有理解及其参数表示.沿用[1]中记号与术语,我们在本文中继续考虑这个插值问题并得到包括真与非真有理解在内的所有解及其参数表...文献[1]应用Lwner与Hankel矩阵解法得出一般有理插值问题的McMillan次数小于插值点个数N(含重数)的所有真有理解及其参数表示.沿用[1]中记号与术语,我们在本文中继续考虑这个插值问题并得到包括真与非真有理解在内的所有解及其参数表示(详情见[2]),因而完全解决该问题。给出一般有理插值问题{(x_i,Y_(ik)),i=1,…,t;k=0,…τ_i-1},其Hankel向量记为b∈Q^(N-J),N=sum from i=1 to tτ_i.设n_1,n_2为b的特征度;(p(λ),q(λ))为典型特征多项式对.令α(λ)=p(λ)ω(λ)展开更多
文摘In this paper, a new kind of bivariate vector valued rational interpolants is recursively established by means of Samelson inverse, with scalar numerator and vector valued denominator. It is essentially different from that of Zhu Gong-qin and Gu Chuan-qing (1990) where the interpolants are constructed by Thiele-type continued fractions with vector valued numerator and scalar denominator. The new approach is more suitable to calculate the value of a vector valued function for a given point.
文摘A new kind of matrix-valued rational interpolants is recursively established by means of generalized Samelson inverse for matrices, with scalar numerator and matrix-valued denominator. In this respect, it is essentially different from that of the previous works [7, 9], where the matrix-valued rational interpolants is in Thiele-type continued fraction form with matrix-valued numerator and scalar denominator. For both univariate and bivariate cases, sufficient conditions for existence, characterisation and uniqueness in some sense are proved respectively, and an error formula for the univariate interpolating function is also given. The results obtained in this paper are illustrated with some numerical examples.
基金The Project was supported by the National Science Foundation of China.
文摘A new kind of vector valued rational interpolants is established by means of Samelson inverse, with scalar numerator and vector valued denominator. It is essen tially different from that of Graves-Morris(1983), where the interpolants are constructed by Thiele-type continued fractions with vector valued numerator and scalar denominator. The new approach is more suitable to calculate the value of a vector valued function for a given point. And an error formula is also given and proven.
文摘A new kind of bivariate vector-valued rational interpolants is recursively estab- lished by means of Samelson inverse over rectangular grids, with scalar numerator and vector-valued denominator. In this respect, it is essentially different from that of the previous work. Sufficient conditions for existence, characterization and uniqueness in some sense are proved respectively. And the resluts in the paper are illustrated with some numerical examples.
基金Supported by the National Natural Science Foundation of China(10171026 and 60473114)
文摘In [3], a kind of matrix-valued rational interpolants (MRIs) in the form of Rn(x) = M(x)/D(x) with the divisibility condition D(x) | ‖M(x)‖2, was defined, and the characterization theorem and uniqueness theorem for MRIs were proved. However this divisibility condition is found not necessary in some cases. In this paper, we remove this restricted condition, define the generalized matrix-valued rational interpolants (GMRIs) and establish the characterization theorem and uniqueness theorem for GMRIs. One can see that the characterization theorem and uniqueness theorem for MRIs are the special cases of those for GMRIs. Moreover, by defining a kind of inner product,we succeed in unifying the Samelson inverses for a vector and a matrix.
文摘文献[1]应用Lwner与Hankel矩阵解法得出一般有理插值问题的McMillan次数小于插值点个数N(含重数)的所有真有理解及其参数表示.沿用[1]中记号与术语,我们在本文中继续考虑这个插值问题并得到包括真与非真有理解在内的所有解及其参数表示(详情见[2]),因而完全解决该问题。给出一般有理插值问题{(x_i,Y_(ik)),i=1,…,t;k=0,…τ_i-1},其Hankel向量记为b∈Q^(N-J),N=sum from i=1 to tτ_i.设n_1,n_2为b的特征度;(p(λ),q(λ))为典型特征多项式对.令α(λ)=p(λ)ω(λ)
