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arXiv · 2402.10335

Correlation Clustering with Vertex Splitting

Matthias Bentert·Alex Crane·Pål Grønås Drange·Felix Reidl·Blair D. Sullivan
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Abstract

We explore Cluster Editing and its generalization Correlation Clustering with a new operation called permissive vertex splitting which addresses finding overlapping clusters in the face of uncertain information. We determine that both problems are NP-hard, yet they exhibit significant differences in parameterized complexity and approximability. For Cluster Editing with Permissive Vertex Splitting, we show a polynomial kernel when parameterized by the solution size and develop a polynomial-time algorithm with approximation factor 7. In the case of Correlation Clustering, we establish para-NP-hardness when parameterized by solution size and demonstrate that computing an $n^{1-\epsilon}$-approximation is NP-hard for any constant $\epsilon > 0$. Additionally, we extend the established link between Correlation Clustering and Multicut to the setting with permissive vertex splitting.

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Matthias Bentert, Alex Crane, Pål Grønås Drange, Felix Reidl, Blair D. Sullivan. 2024-02-15. Correlation Clustering with Vertex Splitting. https://arxiv.org/abs/2402.10335

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