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The multi-fragment algorithm is a heuristic or approximation algorithm for the travelling salesman problem. This algorithm is also sometimes called the "greedy algorithm" for the TSP.
The algorithm builds a tour for the traveling salesman one edge at a time and thus maintains multiple tour fragments, each of which is a simple path in the complete graph of cities. At each stage, the algorithm selects the edge of minimal cost that either creates a new fragment, extends one of the existing paths or creates a cycle of length equal to the number of cities.
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