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arXiv 0711.0948math-phmath.CVmath.MP
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具有质点和奇异连续分量的无反射测度

Reflectionless measures with a point mass and singular continuous component

F. Nazarov, A. Volberg, P. Yuditskii

摘要:

我们构造了支撑在实直线的紧子集E上的测度,其Cauchy积分a.e.的主值为零。关于Lebesgue测度且具有奇异分量的E是充分正则的(满足Widom性质),但不是齐次的,对于齐次谱,这样的构造是不可能的。这种不可能性在描述具有齐次谱的概周期Jacobi矩阵(Sodin-Yuditskii)中发挥了重要作用。

英文摘要:

We construct mesures supported on a compact subset E of the real line having zero principal value of their Cauchy integral a.e. on E with respect to Lebesgue measure and having singular components. E is sufficiently regular (Widom property is satisfied) but not homogeneous as for homogeneous spectrum such construction is impossible. This impossibility played an important role in characterizing almost periodic Jacobi matrices with homogeneous spectrum (Sodin-Yuditskii).

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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