Toeplitz矩阵偶符号特征值的渐近性
Asmptotic of the eigenvalues of Toeplitz matrices with even symbol
AI总结:
本文研究了Toeplitz矩阵偶符号特征值的渐近性质,推导了在N趋于无穷大时,特征值分布的更高阶渐近公式。
摘要:
本文考虑区间[θ₁, θ₂] ⊂ [0, π]和一个可微、周期性且偶函数f,该函数足够光滑,使得f(θ) ∈ [f(θ₁, f(θ₂)] ⇔ θ ∈ [θ₁, θ₂]。然后我们得到Toeplitz矩阵T_N(f)的所有特征值的更高阶渐近公式,当N→+∞时,这些特征值属于[f(θ₁, f(θ₂)](resp. [f(θ₂, f(θ₁)])。\n
英文摘要:
In this paper we consider an interval $[θ\_{1}, θ\_{2}] \subset [0, π]$ and $f$ a differentiable, periodic and even function sufficiently smooth such that $f(θ) \in [f(θ\_{1}, f(θ\_{2})] \iff θ\in [θ\_{1}, θ\_{2}]$. Then we obtain an higher order asymptotic formula for all the eigenvalues of the Toeplitz matrix $T\_N(f)$ as $N \to + \infty$ which belong to $[f(θ\_{1}, f(θ\_{2})]$ (resp. $[f(θ\_{2}, f(θ\_1)]$).
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