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Extension of Vertex Cover and Independent Set in Some Classes of Graphs

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Academic year: 2021

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Figure

Figure 1: Graph G = (V, E) for Ext VC built from I. Vertices of U have a bold border.
Figure 2: Construction of Theorem 3. On the left: A variable x i appearing in four clauses
Figure 3: The graph G ′ = (V ′ , E ′ ) for Ext VC, Vertices in U are drawn bold.

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