We provide a description of the spectrum and compute the eigenvalues distribution of circulant Hankel matrices obtained as symmetrization of classical Toeplitz circulant matrices. Other types of circulant matrices such as simple and Cesàro circulant matrices are also considered.

中文翻译：

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对称循环矩阵的谱分布

我们提供了频谱的描述并计算了作为经典 Toeplitz 循环矩阵的对称化获得的循环 Hankel 矩阵的特征值分布。还考虑了其​​他类型的循环矩阵，例如简单循环矩阵和 Cesàro 循环矩阵。