Y. Akama

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20112026

most citedOn Deformed Dodecahedron Tiling

10 citations · 31 across the 16 of their papers we have counts for

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math.ST2024

Asymptotic locations of bounded and unbounded eigenvalues of sample correlation matrices of certain factor models -- application to a components retention rule

Yohji Akama, Peng Tian

Let the dimension $N$ of data and the sample size $T$ tend to $\infty$ with $N / T \to c > 0$ . The spectral properties of a sample correlation matrix $C$ and a sample covari…

math.ST2022★ 1 cited

Correlation matrix of equi-correlated normal population: fluctuation of the largest eigenvalue, scaling of the bulk eigenvalues, and stock market

Yohji Akama

Given an $N$ -dimensional sample of size $T$ and form a sample correlation matrix $C$ . Suppose that $N$ and $T$ tend to infinity with $T / N$ converging to a fixed finite co…

math.ST2022

A dichotomous behavior of Guttman-Kaiser criterion from equi-correlated normal population

Yohji Akama, Atina Husnaqilati

We consider a $p$ -dimensional, centered normal population such that all variables have a positive variance $σ^{2}$ and any correlation coefficient between different variables is a gi…