Combinatorial Algorithms

@inproceedings{Souza2019CombinatorialA,
  title={Combinatorial Algorithms},
  author={Alexander Souza},
  booktitle={Lecture Notes in Computer Science},
  year={2019}
}
  • A. Souza
  • Published in
    Lecture Notes in Computer…
    2019
  • Computer Science
s of Invited Talks BWT Variants: A Combinatorial Investigation 

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References

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For each integer n the authors determine the smallest order of a connected graph with minus domination number equal to n and show that if T is a tree of order n⩾4, then γ(T)−γ− (T)⩽(n−4)/5 and this bound is sharp.
Discovering Small Target Sets in Social Networks: A Fast and Effective Algorithm
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Une instance du probleme est un graphe, un ensemble F de sommets interdits et un ensemble R de sommets obligatoires. Nous montrons que construire un vertex cover, connexe ou pas, de taille minimale,
An analysis of approximations for maximizing submodular set functions—I
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It is shown that a “greedy” heuristic always produces a solution whose value is at least 1 −[(K − 1/K]K times the optimal value, which can be achieved for eachK and has a limiting value of (e − 1)/e, where e is the base of the natural logarithm.
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It is shown, assuming the exponential time hypothesis (ETH), that there is no polynomial-time algorithm that approximates Densest k-Subgraph to within n1/(loglogn)c factor of the optimum, where c > 0 is a universal constant independent of n.
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