2015Electronic colloquium on computational complexityRequires access

On the Optimality of Bellman-Ford-Moore Shortest Path Algorithm.

Stasys Jukna, Georg Schnitger

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Abstract

We prove a general lower bound on the size of switching-and-rectifier networks over any semiring of zero characteristic, including the ( min ? , + ) semiring. Using it, we show that the classical dynamic programming algorithm of Bellman, Ford and Moore for the shortest s-t path problem is optimal, if only Min and Sum operations are allowed.

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What this paper is about

We prove a general lower bound on the size of switching-and-rectifier networks over any semiring of zero characteristic, including the ( min ? , + ) semiring. Using it, we show that the classical dynamic programming algorithm of Bellman, Ford and Moore for the shortest s-t path problem is optimal, if only Min and Sum operations are allowed.

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Available abstract

We prove a general lower bound on the size of switching-and-rectifier networks over any semiring of zero characteristic, including the ( min ? , + ) semiring. Using it, we show that the classical dynamic programming algorithm of Bellman, Ford and Moore for the shortest s-t path problem is optimal, if only Min and Sum operations are allowed.

Key concepts: Shortest path problem, Dynamic programming, Path (computing), Semiring, Mathematics, Combinatorics, Algorithm, Bellman equation

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