Nowhere-zero integral flows on a bidirected graph |
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Authors: | A Bouchet |
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Institution: | Université du Maine, 72017 - Le Mans Cedex, France |
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Abstract: | It is proved that every bidirected graph which can be provided with a nowhere-zero integral flow can also be provided with a nowhere-zero integral flow with absolute values less than 216. The connection between these flows and the local tensions on a graph which is 2-cell imbedded in a closed 2-manifold is explained. These local tensions will be studied in a subsequent paper. |
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