20. Warshall’s Algorithm for Computing Transitive Closure
The lecture discusses Warshall's algorithm for computing the transitive closure of a relation represented by a matrix. It highlights the algorithm's efficiency in reducing the computing cost from O(n^4) to O(n^3) by iteratively defining matrices and updating paths between nodes based on allowable intermediate nodes. The lecture also emphasizes the importance of clarifying the conditions for valid paths within the context of the algorithm.
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