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arXiv 1504.07261math.SPmath.FA
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自伴算子在紧算子理想中的作用

Functions of self-adjoint operators in ideals of compact operators

Alexander V. Sobolev

摘要:

对于自伴算子$A, B$,有界算子$J$和函数$f:\mathbb R\to\mathbb C$,我们得到了差$f(A)J-Jf(B)$关于算子$AJ-JB$的紧算子的拟赋范理想的界.重点是函数$f$,除了很多点外,其他地方都是光滑的。一个典型的例子是函数$f(t) = |t|^γ$和$γ\in (0, 1)$。所得结果被应用于导出迹$tr f(S)$与$S$是一个Wiener-Hopf算子与一个不连续的符号的两项拟经典渐近公式。

英文摘要:

For self-adjoint operators $A, B$, a bounded operator $J$, and a function $f:\mathbb R\to\mathbb C$ we obtain bounds in quasi-normed ideals of compact operators for the difference $f(A)J-Jf(B)$ in terms of the operator $AJ-JB$. The focus is on functions $f$ that are smooth everywhere except for finitely many points. A typical example is the function $f(t) = |t|^γ$ with $γ\in (0, 1)$. The obtained results are applied to derive a two-term quasi-classical asymptotic formula for the trace $tr f(S)$ with $S$ being a Wiener-Hopf operator with a discontinuous symbol.

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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