Abstract
This paper proposes a simple algorithm for the graph design of small-diameter networks. For given nodes n and degree d, this algorithm can be used to construct a directed graph with diameter ⌈logd n⌉, which is at most one larger than the lower bound ⌈logd (n(d − 1) + 1)⌉ − 1. Its average distance is also close to the lower bound. The algorithm can be used to construct a directed graph with smaller diameter, compared with any other conventional methods, when n is larger.

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