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simple arbitrage
This project forked from mlbright/arbitrage
simple arbitrage
Bellman-Ford only detects presence of negative weight cycle, not what that negative cycle is. There's almost always a negative weight cycle, and in practice this algorithm is useless, as indicated by the author of the blog post that inspired this code. This is a solution to problem presented in the textbook "Introduction to Algorithms", by Cormen, Leiserson, Rivest, Stein, in its chapter on the single-source shortest paths problem. To explain the problem in terms of the Bellman-Ford algorithm, it is to: - detect the existence of a negative weight cycle in the currency graph - produce the path of any (not all) negative weight cycle in the graph Negative weight cycle is determined by doing an extra relaxation step after |V| - 1 relaxation steps. After |V| - 1 relaxations, all paths from the source to each vertex are guaranteed to be fixed, if there is no negative weight cycle. However, supposing after |V| relaxations, the distance value for a vertex v has decreased, then a negative weight cycle starts and ends at v. Is there anything wrong with this logic?
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