Geodesic
New proof of a characterization of geodetic graphs
Czechoslovak Mathematical Journal, Tome 52 (2002) no. 1, pp. 33-39.

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In [3], the present author used a binary operation as a tool for characterizing geodetic graphs. In this paper a new proof of the main result of the paper cited above is presented. The new proof is shorter and simpler.
Classification : 05C12, 05C75, 20N02
Keywords: geodetic graphs; shortest paths; binary operations 
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     author = {Nebesk\'y, Ladislav},
     title = {New proof of a characterization of geodetic graphs},
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Nebeský, Ladislav. New proof of a characterization of geodetic graphs. Czechoslovak Mathematical Journal, Tome 52 (2002) no. 1, pp. 33-39. http://geodesic.mathdoc.fr/item/CMJ_2002__52_1_a4/