Abstract
In this chapter we focus once more on the transitive closure of relations In view of the applications we employ graph-theoretical language and speak of the reachability relation. In Sect. 6.1 we define paths and distinguish between paths in 1-graphs and paths in directed graphs. In the first case one considers points in the second, points and arcs. We define reachability in terms of paths, and discuss rooted graphs and strong connectedness. In Sect. 6.2 we discuss a similar close relationship between joinability, expressed in terms of chains, and connectedness.
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6.6 References
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Schmidt, G., Ströhlein, T. (1993). Reachability. In: Relations and Graphs. EATCS Monographs on Theoretical Computer Science. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-77968-8_6
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DOI: https://doi.org/10.1007/978-3-642-77968-8_6
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