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arXiv 0907.3761math.FAmath.OA
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几类新的复对称算子

Some new classes of complex symmetric operators

Stephan Ramon Garcia, Warren R. Wogen

摘要:

我们说一个算子$T \in B(H)$是复对称的,如果存在一个共轭线性等距对合$C:H\to H$,使得$T = CT^*C$。我们证明了副正规算子,运营商是代数的程度2(包括所有的幂等元),和大型类的秩1扰动的正规算子是复对称的。这些结果从抽象的角度解释了为什么压缩位移和Volterra积分算子是复对称的。最后,我们试图描述所有复杂的对称部分等距,获得最尖锐的可能的声明,只给数据$(\dim \ker T, \dim \ker T^*)$。

英文摘要:

We say that an operator $T \in B(H)$ is complex symmetric if there exists a conjugate-linear, isometric involution $C:H\to H$ so that $T = CT^*C$. We prove that binormal operators, operators that are algebraic of degree two (including all idempotents), and large classes of rank-one perturbations of normal operators are complex symmetric. From an abstract viewpoint, these results explain why the compressed shift and Volterra integration operator are complex symmetric. Finally, we attempt to describe all complex symmetric partial isometries, obtaining the sharpest possible statement given only the data $(\dim \ker T, \dim \ker T^*)$.

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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