Wigner 半圓分布
Wigner semicircle distribution
ウィグナー半円分布 - Wikipedia
Wigner の半圓則
(Wigner's semicircle law)
https://ja.wikipedia.org/wiki/ウィグナー半円分布#:~:text=ウィグナーの半円則%20(Wigner%20semicircle%20law)
Wigner's Semicircle Law -- from Wolfram MathWorld