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- W2131648138 abstract "Information does not generally behave like a flow in communication networks with multiple sources and sinks. However, it is often conceptually and practically useful to be able to associate separate data streams with each source-sink pair, with only routing and no coding performed at the network nodes. This raises the question of whether there is a nontrivial class of network topologies for which achievability is always equivalent to “routability”, for any combination of source signals and positive channel capacities. This paper considers a possibly cyclic, directed, errorless network with n source-sink pairs, mutually independent source signals, and a relaxed communication objective in terms of demanded information rates at sinks. The concept of triangularizability is introduced and it is shown that, if the network topology is triangularizable, then a given combination of source signals, demand rates and channel capacities is achievable if and only if the digraph supports a feasible multicommodity flow." @default.
- W2131648138 created "2016-06-24" @default.
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- W2131648138 date "2011-07-01" @default.
- W2131648138 modified "2023-09-25" @default.
- W2131648138 title "When is n-pairs information a multicommodity flow?" @default.
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- W2131648138 doi "https://doi.org/10.1109/isit.2011.6034137" @default.
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