Puzzling Permutations
نویسنده
چکیده
We show how to describe and analyse multistage interconnection networks in a relational framework. We give simple elegant descriptions of butterfly networks, using only two functions for building networks from smaller networks. By studying the algebra of these functions, we can give a clear account of the properties of networks, without resorting to the standard methods of reasoning in terms of binary representations of the addresses of data elements. The paper is intended as a tutorial introduction to multistage interconnection networks.
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