## Abstract We show that there are 2^[n/2]β4^ largest graphs of order __n__ β₯ 7 having exactly one hamiltonian cycle. a recursive procedure for constructing these graphs is described.
Vertices of Small Degree in Uniquely Hamiltonian Graphs
β Scribed by J.A. Bondy; Bill Jackson
- Publisher
- Elsevier Science
- Year
- 1998
- Tongue
- English
- Weight
- 206 KB
- Volume
- 74
- Category
- Article
- ISSN
- 0095-8956
No coin nor oath required. For personal study only.
β¦ Synopsis
Let G be a uniquely hamiltonian graph on n vertices. We show that G has a vertex of degree at most c log 2 8n+3, where c=(2&log 2 3) &1 r2.41. We show further that G has at least two vertices of degree less than four if it is planar and at least four vertices of degree two if it is bipartite.
π SIMILAR VOLUMES
The generating function for labelled graphs in which each vertex has degree at least three is obtained by the Principle of Inclusion and Exclusion. Asymptotic and explicit values for the coefficients are calculated in the connected case. The results are extended to bipartite graphs.
## Abstract A (1,2)βeulerian weight __w__ of a grph is hamiltonian if every faithful cover of __w__ is a set of two Hamilton circuits. Let __G__ be a 3βconnected cubic graph containing no subdivition of the Petersen graph. We prove that if __G__ admits a hamiltonian weight then __G__ is uniquely 3β
## Abstract We construct 3βregular (cubic) graphs __G__ that have a dominating cycle __C__ such that no other cycle __C__~1~ of __G__ satisfies __V(C)__ β __V__(__C__~1~). By a similar construction we obtain loopless 4βregular graphs having precisely one hamiltonian cycle. The basis for these const