Plurisubharmonic noncommutative rational functions
Plurisubharmonic noncommutative rational functions
复制标题
多次谐波非交换有理函数
DOI:
10.1016/j.jmaa.2020.124421
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发表时间:
2020
影响因子:
1.3
通讯作者:
Volčič, Jurij
中科院分区:
文献类型:
--
作者:
Dym, Harry;Helton, J. William;Klep, Igor;McCullough, Scott;Volčič, Jurij
A noncommutative (nc) function in x 1,…, x g, x 1⁎,…, x g⁎ is called plurisubharmonic (plush) if its nc complex Hessian takes only positive semidefinite values on an nc neighborhood of 0. The main result of this paper shows that an nc rational function is plush if and only if it is a composite of a convex rational function with an analytic (no x j⁎) rational function. The proof is entirely constructive. Further, a simple computable necessary and sufficient condition for an nc rational function to be plush is given in terms of its minimal realization.
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影响因子:
1.7
作者:
J. Helton;I. Klep;S. McCullough;Jurij Volvcivc
通讯作者:
J. Helton;I. Klep;S. McCullough;Jurij Volvcivc
DOI:
10.4153/cmb-2017-044-4
发表时间:
2018
期刊:
Canadian Mathematical Bulletin
影响因子:
--
作者:
Agler, Jim;McCarthy, John
通讯作者:
McCarthy, John
影响因子:
1.7
作者:
J. Berstel;C. Reutenauer
通讯作者:
C. Reutenauer
DOI:
10.1017/s0308210515000748
发表时间:
2016
期刊:
Proceedings of the Royal Society of Edinburgh: Section A Mathematics
影响因子:
--
作者:
John E. McCarthy;R. Timoney
通讯作者:
R. Timoney
DOI:
10.1016/j.jfa.2011.08.006
发表时间:
2010
期刊:
arXiv: Operator Algebras
影响因子:
--
作者:
J. M. Greene;J. Helton;V. Vinnikov
通讯作者:
V. Vinnikov