## Abstract We consider the problem of the minimum number of Hamiltonian cycles that could be present in a Hamiltonian maximal planar graph on __p__ vertices. In particular, we construct a __p__βvertex maximal planar graph containing exactly four Hamiltonian cycles for every __p__ β₯ 12. We also pro
On the Number of Acute Triangles in a Straight-Line Embedding of a Maximal Planar Graph
β Scribed by Atsushi Kaneko; Hiroshi Maehara; Mamoru Watanabe
- Publisher
- Elsevier Science
- Year
- 1999
- Tongue
- English
- Weight
- 80 KB
- Volume
- 75
- Category
- Article
- ISSN
- 0095-8956
No coin nor oath required. For personal study only.
β¦ Synopsis
In this paper we show that any maximal planar graph with m triangles except the unbounded face can be transformed into a straight-line embedding in which at least WmΓ3X triangles are acute triangles. Moreover, we show that any maximal outerplanar graph can be transformed into a straight-line embedding in which all faces are acute triangles except the unbounded face.
π SIMILAR VOLUMES
## Abstract Let __p__ and __C__~4~ (__G__) be the number of vertices and the number of 4βcycles of a maximal planar graph __G__, respectively. Hakimi and Schmeichel characterized those graphs __G__ for which __C__~4~ (__G__) = 1/2(__p__^2^ + 3__p__ β 22). This characterization is correct if __p__ β₯
We show new lower and upper bounds on the maximum number of maximal induced bipartite subgraphs of graphs with n vertices. We present an infinite family of graphs having 105 n=10 % 1:5926 n ; such subgraphs show an upper bound of O(12 n=4 ) ΒΌ O(1:8613 n ) and give an algorithm that finds all maximal
## Abstract Let __G__ be a graph on __p__ vertices with __q__ edges and let __r__β=β__q__βββ__p__β=β1. We show that __G__ has at most ${15\over 16} 2^{r}$ cycles. We also show that if __G__ is planar, then __G__ has at most 2^__r__βββ1^β=β__o__(2^__r__βββ1^) cycles. The planar result is best possib