| Robert Cori. Graphes planaires et syst`emes de parenth`eses. Technical report, Centre National de la Recherche Scientifique, Institute Blaise Pascal, Paris, 1969. |
....to specify adjacent edges in the edge order at each vertex, but the maps in Figure 2 show that again nonisomorphic maps may have the same representation. To address these problems, Edmonds [16] proposed a method of representing maps which was later used for a theory of combinatorial maps by Cori [14], Jacques [25] Walsh and Lehman [34] and Tutte [32] In this representation a dart is an edge with an assigned direction. Thus, each edge is associated with two darts which we will say are anti darts of one another. Notice that a dart is not quite the same as a directed edge (given as an ordered ....
Robert Cori. Graphes planaires et syst`emes de parenth`eses. Technical report, Centre National de la Recherche Scientifique, Institute Blaise Pascal, Paris, 1969.
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