Let the reals be extended to include oo with o~ > r
On the Maximum Number of Edges in Topological Graphs with no Four Pairwise Crossing Edges
โ Scribed by Eyal Ackerman
- Publisher
- Springer
- Year
- 2009
- Tongue
- English
- Weight
- 579 KB
- Volume
- 41
- Category
- Article
- ISSN
- 0179-5376
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๐ SIMILAR VOLUMES
Suppose that n i> 2t + 2 (t/> 17). Let G be a graph with n vertices such that its complement is connected and, for all distinct non-adjacent vertices u and v, there are at least t common neighbours. Then we prove that and Furthermore, the results are sharp.
In this paper, we prove that any edge-coloring critical graph G with maximum degree ยฟ (11 + โ 49 -24 )=2, where 6 1, has the size at least 3(|V (G)| -) + 1 if 6 7 or if ยฟ 8 and |V (G)| ยฟ 2 --4 -( + 6)=( -6), where is the minimum degree of G. It generalizes a result of Sanders and Zhao.
Soit H = (X. ~1 un hypergraphe h-uniforme avec IX] = net soit L h ~(H! le graphe Jont les sommets reprdsentent les arates de H, deux sommets 6lant reli6s si et seulement si t~s z~r6tes qu'ils reprdsen!ent intersectent en h -1 sommet,=. Nous montrons que sif,, t(H) ne contienl pas de cycle, alors I~[