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The chapter covers the concept of transitive closure in relations using graphical interpretations. The connectivity relationship is defined, showing how it is constructed through the union of powers of a relation. The naive algorithm for computing this transitive closure is introduced, emphasizing its significance in graph theory and practical applications like social networks.
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19.2
The Relationship Between Transitive Closure And Connectivity Relation
This section explores the concept of transitive closure in relation to connectivity in directed graphs, defining the connectivity relation and proving the relationship between transitive closure and connectivity.
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Term: Transitive Closure
Definition: The smallest transitive relation that contains a given relation R, indicating if paths exist between elements in R.
Term: Connectivity Relationship
Definition: An abstraction where an element is related to itself if accessible by any path in a directed graph representation of the relation.
Term: Boolean Matrix
Definition: A representation of a relation where each entry indicates the existence of a relation between elements, utilized for computing powers of relations.
Term: Naive Algorithm
Definition: An algorithm to compute the transitive closure using successive Boolean matrix multiplications and disjunctions.