arxivmath.STstat.MEstat.ML2026-07-07
Closed-form fractional radial links for elliptical Mahalanobis discriminant analysis
We study binary classification under shared-generator elliptical class-conditional distributions. The log-likelihood ratio is an additive function of the two squared Mahalanobis radii, with radial link $\varphi=\log g$; QDA is recovered only when this link is affine. We derive th…