Integrability and regularity of rational functions

Integrability and regularity of rational functions
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有理函数的可积性和正则性

DOI:
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发表时间:
2014
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影响因子:
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通讯作者:
Greg Knese
Greg Knese
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作者:
Greg Knese

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受数学和工程文献中最近工作的启发,我们研究了双圆盘上全纯有理函数在双环面上的可积性和非切正则性。研究这种有理函数的一种方法是固定分母,并在分子中观察多项式的理想,使得有理函数是平方可积的。一个具体的列表中的发电机给出了这个理想,以及精确计数的维度的子空间的分子与一个指定的范围上的二度。维数计算是通过在有限维希尔伯特空间上构造一对自然的交换压缩并研究它们的联合广义特征空间来完成的。
Motivated by recent work in the mathematics and engineering literature, we study integrability and non‐tangential regularity on the two‐torus for rational functions that are holomorphic on the bidisk. One way to study such rational functions is to fix the denominator and look at the ideal of polynomials in the numerator such that the rational function is square integrable. A concrete list of generators is given for this ideal as well as a precise count of the dimension of the subspace of numerators with a specified bound on bidegree. The dimension count is accomplished by constructing a natural pair of commuting contractions on a finite‐dimensional Hilbert space and studying their joint generalized eigenspaces.
DOI: 10.1007/s00208-011-0650-7
发表时间: 2010-02
影响因子: 1.4
作者:
J. Agler;John E. McCarthy;N. Young
通讯作者: J. Agler;John E. McCarthy;N. Young