Geodesic
Note on the relation between radius and diameter of a graph
Mathematica Bohemica, Tome 120 (1995) no. 2, pp. 203-207.

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The known relation between the standard radius and diameter holds for graphs, but not for digraphs. We show that no upper estimation is possible for digraphs. We also give some remarks on distances, which are either metric or non-metric.
DOI : 10.21136/MB.1995.126222
Classification : 05C12, 05C20
Keywords: digraph; radius; diameter; graph; strong digraph 
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Gliviak, Ferdinand; Kyš, Peter. Note on the relation between radius and diameter of a graph. Mathematica Bohemica, Tome 120 (1995) no. 2, pp. 203-207. doi : 10.21136/MB.1995.126222. http://geodesic.mathdoc.fr/articles/10.21136/MB.1995.126222/

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