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- W2090860575 abstract "Faults and viruses often spread in networked environments by propagating from site to neighboring sites. We model this process of network contamination by graphs. Consider a graph $$G=(V,E)$$G=(V,E), whose vertex set is contaminated and our goal is to decontaminate the set $$V$$V using mobile decontamination agents that traverse along the edge set of $$G$$G. Temporal immunity, $$tau (G) ge 0$$?(G)?0, is defined as the time that a decontaminated vertex of $$G$$G can remain continuously exposed to some contaminated neighbor without getting infected itself. The immunity number of $$G$$G, $$iota _k(G)$$?k(G), is the least $$tau (G)$$?(G) that is required to decontaminate $$G$$G using $$k$$k agents. We study immunity number for some classes of graphs corresponding to network topologies and present upper bounds on $$iota _1(G)$$?1(G), in some cases, with matching lower bounds. Variations of this problem have been extensively studied in literature, but proposed algorithms have been restricted to monotone strategies, where a vertex, once decontaminated, may not be recontaminated. We exploit nonmonotonicity to give bounds which are strictly better than those derived using monotone strategies." @default.
- W2090860575 created "2016-06-24" @default.
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- W2090860575 date "2015-04-30" @default.
- W2090860575 modified "2023-09-28" @default.
- W2090860575 title "Network Decontamination with a Single Agent" @default.
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- W2090860575 doi "https://doi.org/10.1007/s00373-015-1579-5" @default.
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