Author

Jie Xue

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Preprint Oct 2026

How to Fix a Broken Metric: A Linear Kernel, Tight Bounds, and Tree Metrics

Given a complete graph whose edge weights represent dissimilarities, Metric Violation Distance asks whether at most $k$ weights can be changed to form a metric. Motivated by metric repair for noisy data, the problem admits a polynomial-time $O(\log n)$-approximation due to Cohen-Addad, Fan, Lee and de Mesmay [SIAM J. C...

Sayan Bandyapadhyay, William Lochet, D. Lokshtanov et al. · 0 citations

Sep 2026

Single-Exponential Algorithms for Directed Feedback Vertex Set on Planar Digraphs

We consider Directed Feedback Vertex Set on planar digraphs, parameterized by the solution size $k$. We give a randomized algorithm with one-sided error running in time $(2+\sqrt5)^k n^{O(1)}= 4.24^k n^{O(1)}$, and a deterministic algorithm running in time $8.04^k n^{O(1)}$. Both algorithms use polynomial space. To the...

D. Lokshtanov, Saket Saurabh, Jie Xue · arXiv.org · 1 citation

Preprint Sep 2026

Counting Paths and Trees via Exterior Algebra

These algorithms combine exterior algebra with random matrix estimators, using the tensor-train moment bound of Rakhshan and Rabusseau~[AISTATS 2020].

Fahad Panolan, Saket Saurabh, M. Zehavi et al. · 0 citations