Question: Prove that the following C4-FREE DELETION problem is NP-complete. Instance: Graph G = (V,E) and positive integer k. Question: Does G contain k vertices V'

Prove that the following C4-FREE DELETION problem is NP-complete. Instance: Graph

Prove that the following C4-FREE DELETION problem is NP-complete. Instance: Graph G = (V,E) and positive integer k. Question: Does G contain k vertices V' such that G- V contains no 4-cycle as an induced subgraph? Hint: Use a reduction from Vertex Cover by local replacement

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