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arXiv 2102.01726math.AGmath.FAmath.OC
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不变双曲曲线:数值域的行列式表示和应用

Invariant hyperbolic curves: determinantal representations and applications to the numerical range

Faye Pasley Simon, Cynthia Vinzant

摘要:

在这里,我们研究空间的真正的双曲平面曲线是不变的循环和二面体群的作用下,并证明他们有行列式表示,证明这种不变性。我们针对给定次数的不变双曲多项式集给出了努伊定理的类似物。其主要定理是:每个不变的双曲平面曲线都有一个用块循环加权移位矩阵表示的行列式。这概括了Lentzos和第一作者以及Chien和Nakazato以前的工作。一个推论是,如果矩阵的数值域在旋转下不变,则它是块循环加权移位矩阵的数值域。

英文摘要:

Here we study the space of real hyperbolic plane curves that are invariant under actions of the cyclic and dihedral groups and show they have determinantal representations that certify this invariance. We show an analogue of Nuij's theorem for the set of invariant hyperbolic polynomials of a given degree. The main theorem is that every invariant hyperbolic plane curve has a determinantal representation using a block cyclic weighted shift matrix. This generalizes previous work by Lentzos and the first author, as well as by Chien and Nakazato. One consequence is that if the numerical range of a matrix is invariant under rotation, then it is the numerical range of a block cyclic weighted shift matrix.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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