Comments on the Complete Characterization of a Family of Solutions to a Generalized Fisher Criterion
The Journal of Machine Learning Research
Semi-supervised linear discriminant analysis through moment-constraint parameter estimation
Pattern Recognition Letters
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Recently, Ye (2005) suggested yet another optimization criterion for discriminant analysis and proposed a characterization of the family of solutions to this objective. The characterization, however, merely describes a part of the full solution set, that is, it is not complete and therefore not at all a characterization. This correspondence first gives the correct characterization and afterwards compares it to Ye's.