Some graphic uses of an even number of odd nodes
Annales de l'institut Fourier, Tome 49 (1999) no. 3 , p. 815-827
doi : 10.5802/aif.1694
URL stable : http://www.numdam.org/item?id=AIF_1999__49_3_815_0

La parité des degrés dans les grands graphes d’échanges implicites implique des théorèmes EP qui assurent l’existence d’un second objet, sans assurer d’une manière évidente un algorithme polynomial pour trouver cet objet.
Vertex-degree parity in large implicit “exchange graphs” implies some EP theorems asserting the existence of a second object without evidently providing a polytime algorithm for finding a second object.

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