## Abstract We draw the __n__‐dimensional hypercube in the plane with ${5\over 32}4^{n}-\lfloor{{{{n}^{2}+1}\over 2}}\rfloor {2}^{n-2}$ crossings, which improves the previous best estimation and coincides with the long conjectured upper bound of Erdös and Guy. © 2008 Wiley Periodicals, Inc. J Graph
Upper Bounds on the Maximal Number of Facets of 0/1-Polytopes
✍ Scribed by Tamás Fleiner; Volker Kaibel; Günter Rote
- Publisher
- Elsevier Science
- Year
- 2000
- Tongue
- English
- Weight
- 157 KB
- Volume
- 21
- Category
- Article
- ISSN
- 0195-6698
No coin nor oath required. For personal study only.
✦ Synopsis
We prove two new upper bounds on the number of facets that a d-dimensional 0/1-polytope can have. The first one is 2(d -1)!+2(d -1) (which is the best one currently known for small dimensions), while the second one of O((d -2)!) is the best known bound for large dimensions.
📜 SIMILAR VOLUMES
Using a technique developed by A. Nilli (1991, Discrete Math. 91, 207 210), we estimate from above the Cheeger number of a finite connected graph G of small degree (2(G) 5) admitting sufficiently distant edges. ## 2001 Academic Press Let G=(V(G), E(G)) be a finite connected graph. The Cheeger numb
## Abstract The upper bound for the harmonious chromatic number of a graph that has been given by Sin‐Min Lee and John Mitchem is improved.
It is well known that almost every graph in the random space G(n, p) has chromatic number of order O(np/ log(np)), but it is not clear how we can recognize such graphs without eventually computing the chromatic numbers, which is NP-hard. The first goal of this article is to show that the above-menti
## Abstract Harary stated the conjecture that for any graph __G__ with __n__ edges and without isolated vertices __r__(__K__~3~,__G__) ⩽ 2__n__ + 1. Erdös, Faudree, Rousseau, and Schelp proved that __r__(__K__~3~,__G__) ⩽ ⌈8/3__n__⌉. Here we prove that __r__(__K__~3~,__G__) ⩽ ⌊5/2__n__⌋ −1 for __n_