In this paper, it is shown that, for a minor-closed class ~ of matroids, the class of matroids in which every hyperplane is in Jยข' is itself minor-closed and has, as its excluded minors, the matroids U1,1 @ N such that N is an excluded minor for ,g. This result is applied to the class of matroids of
โฆ LIBER โฆ
The biased graphs whose matroids are binary
โ Scribed by Thomas Zaslavsky
- Publisher
- Elsevier Science
- Year
- 1987
- Tongue
- English
- Weight
- 655 KB
- Volume
- 42
- Category
- Article
- ISSN
- 0095-8956
No coin nor oath required. For personal study only.
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A graph of a triangulation of the toms is said to be uniquely embeddable in the torus provided all its embeddings are isomorphic as triangulations. An infinite set of toms triangulations of connectivity 5 has been constructed, with graphs that are not uniquely embeddable in the torus.