Isospectrality and matrices with concentric circular higher rank numerical ranges
Isospectrality and matrices with concentric circular higher rank numerical ranges
复制标题
同心圆高阶数值范围的同谱性和矩阵
DOI:
10.1016/j.laa.2021.08.025
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发表时间:
2021
影响因子:
1.1
通讯作者:
Woerdeman, Hugo J.
中科院分区:
文献类型:
--
作者:
Poon, Edward;Woerdeman, Hugo J.
We characterize under what conditions n× n Hermitian matrices A 1 and A 2 have the property that the spectrum of cos t A 1+ sin t A 2 is independent of t (thus, the trigonometric pencil cos t A 1+ sin t A 2 is isospectral). One of the characterizations requires the first⌈ n 2⌉ higher rank numerical ranges of the matrix A 1+ i A 2 to be circular disks with center 0. Finding the unitary similarity between cos t A 1+ sin t A 2 and, say, A 1 involves finding a solution to Lax's equation.
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DOI:
--
发表时间:
2008
期刊:
影响因子:
--
作者:
Man;Michael Giesinger;J. Holbrook;D. Kribs
通讯作者:
D. Kribs
影响因子:
1
作者:
P. Lancaster;H. Wimmer
通讯作者:
P. Lancaster;H. Wimmer
DOI:
--
发表时间:
2009
期刊:
影响因子:
--
作者:
R. Agarwal;D. O’Regan
通讯作者:
D. O’Regan
DOI:
10.1002/cpa.3160110203
发表时间:
2015
期刊:
2008 23rd Annual IEEE Conference on Computational Complexity
影响因子:
--
作者:
P. Lax
通讯作者:
P. Lax
影响因子:
4
作者:
Valentin Matache;M. Matache
通讯作者:
M. Matache