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- W2056575191 abstract "Let G be an undirected graph with maximum degree at most 3 such that G does not contain any of the three graphs given in the paper as a subgraph. We prove that the independence number of G is at least n(G)/3+nt(G)/42, where n(G) is the number of vertices in G and nt(G) is the number of nontriangle vertices in G. This bound is tight as implied by the well-known tight lower bound of 5n(G)/14 on the independence number of triangle-free graphs of maximum degree at most 3. We show some algorithmic applications of the aforementioned combinatorial result to the area of parameterized complexity. We present a linear-time kernelization algorithm for the independent set problem on graphs with maximum degree at most 3 that computes a kernel of size at most 140k/47<3k, where k is the given parameter. This improves the known 3k upper bound on the kernel size for the problem, and implies a 140k/93 lower bound on the kernel size for the vertex cover problem on graphs with maximum degree at most 3." @default.
- W2056575191 created "2016-06-24" @default.
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- W2056575191 date "2013-03-01" @default.
- W2056575191 modified "2023-09-30" @default.
- W2056575191 title "On the independence number of graphs with maximum degree 3" @default.
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- W2056575191 doi "https://doi.org/10.1016/j.tcs.2013.01.031" @default.
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