Author

Evangelos Kipouridis

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Preprint Sep 2026

Metric Weighted Edit Distance: $(3+\varepsilon)$-Approximation in $\widetilde O_\varepsilon(N^{1.6})$ Time

For every $0<\varepsilon \le 1$, we give a randomized $(3+\varepsilon)$-approximation to weighted edit distance when the costs form a metric on the alphabet augmented with a gap symbol. For strings of total length $N$, the running time is $\widetilde{O}(N^{8/5}/\varepsilon^{16/5})$, where $\widetilde{O}$ suppresses fac...

D. Das, Evangelos Kipouridis, Tomasz Kociumaka · 0 citations

Preprint Aug 2026

Constrained Correlation Clustering: Towards Optimality

This work identifies Constrained Correlation Clustering as a variant of Correlation Clustering for which optimal approximations might be within reach, and significantly tighten the gap, by showing that the optimal approximation factor lies in $[2,\frac{16}{7}-\gamma)$ for a small constant $0$.

Sina Azizeddin, Evangelos Kipouridis, Nithin M. Varma · 2 citations