We study the hardness and approximability of the problem CliqueEditing, where the goal is to edit a given graph G into a graph consisting of a clique and a set of isolated vertices while using a minimum number of editing operations. The problem is interesting from both practical and theoretical points of view, and it belongs to the well-studied family of graph modification problems. We prove that the problem is NP-complete and construct a 3.524-approximation algorithm. Furthermore, we prove an existence of a PTAS for the still NP-complete version of the problem restricted to bipartite graphs, and the existence of a polynomial-time algorithm for the problem restricted to planar graphs.
Keywords
- Bipartite Graph
- Planar Graph
- Approximation Ratio
- Minimum Degree
- Edge Incident
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