Author

Guan-Lin Mo

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Preprint Sep 2026

The Stretch Factor of Planar Delaunay Triangulations Is Less Than 1.5949

Delaunay triangulations are the classical plane spanners: the shortest path between two vertices is at most a constant times as long as the segment between them. Determining the smallest such constant, the worst-case stretch factor of Delaunay triangulations, is a long-standing open problem; the best known lower and up...

Guan-Lin Mo, Kang Cheng, Hu Ding · 0 citations

#machine learning Preprint Sep 2026

A Sub-4 Approximation for Fair $k$-Means

This work proposes an approximation algorithm that combines a linear programming relaxation with geometric transformations of the input to construct candidate center sets in fair $k-means clustering in Euclidean space and satisfies all fairness constraints exactly.

Kang Cheng, Guan-Lin Mo, Shi-Hong Song et al. · 0 citations