On the singularity of the Fisher Information matrix in the sine-skewed family on the d-dimensional torus本文针对ddd维环面上正弦偏斜模型在对称性附近出现的费雪信息矩阵奇异这一未决问题,给出了该类模型出现奇异性的一般性刻画。Emily Schutte, Sophia Loizidou, Vincent Laheurte2026-03-05🔢 math