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New approximations for minimum-weighted dominating sets and minimum-weighted connected dominating sets on unit disk graphs
Minimum-weighted dominating set Minimum-weighted connected dominating
2012/12/3
Given a node-weighted graph, the minimum-weighted dominating set (MWDS) problem is to find a minimum-weighted vertex subset such that, for any vertex, it is contained in this subset or it has a neighb...
Ideal games, Ramsey sets and the Frechet-Urysohn property
Semiselective coideal Ramsey theory Frechet-Urysohn property
2010/12/8
It is shown that Matet’s characterization ([8]) of H-Ramseyness relative to a selec-tive coideal H, in terms of games of Kastanas ([5]), still holds if we consider semiselec-tivity ([2]) instead of se...