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- W1519679194 abstract "We study approximation solutions for the densest k-subgraph problem (DS-k) on several classes of intersection graphs. We adopt the concept of σ-quasi elimination orders, introduced by Akcoglu et al. [1], generalizing the perfect elimination orders for chordal graphs, and develop a simple O(σ)-approximation technique for graphs admitting such a vertex order. This concept allows us to derive constant factor approximation algorithms for DS-k on many intersection graph classes, such as chordal graphs, circular-arc graphs, claw-free graphs, line graphs of l-hypergraphs, disk graphs, and the intersection graphs of fat geometric objects. We also present a PTAS for DS-k on unit disk graphs using the shifting technique." @default.
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- W1519679194 date "2011-01-01" @default.
- W1519679194 modified "2023-09-25" @default.
- W1519679194 title "Densest k-Subgraph Approximation on Intersection Graphs" @default.
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- W1519679194 doi "https://doi.org/10.1007/978-3-642-18318-8_8" @default.
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