Author

Ahmad Hassanat

Mutah University

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Open access Jul 2026

A Sign-Symmetric Reformulation of the Hassanat Distance for Data with Negative Feature Values

The Sign-Symmetric Hassanat Distance (SHasD), a single branch-free formula D(a,b)=|a−b|/(1+max(|a|,|b|)) that is invariant under the reflection x↦−x, coincides exactly with HasD on non-negative data, and removes the conditional shift entirely.

Mohammad Saad Alaydaa, Gaseb N. Alotibi, Ahmad S. Tarawneh et al. · Symmetry · 0 citations

Open access Jul 2026

On the Optimality of k=n in k-Nearest Neighbor Classification: Sub-Optimality Rates, Dimension-Aware Selection, and Hassanat Distance Comparison

The theoretical results provide a principled non-cross-validated alternative to the classical n rule, and cross-validation remains the strongest k-selection strategy when computationally feasible.

Ahmad Hassanat, A. A. Alkasasbeh, Esra’a Alkafaween et al. · Mathematics · 1 citation