## Abstract In this paper we obtain chromatic polynomials of connected 3β and 4βchromatic planar graphs that are maximal for positive integerβvalued arguments. We also characterize the class of connected 3βchromatic graphs having the maximum number of __p__βcolorings for __p__ β₯ 3, thus extending a
On the connectivity of maximal planar graphs
β Scribed by S. L. Hakimi; E. F. Schmeichel
- Publisher
- John Wiley and Sons
- Year
- 1978
- Tongue
- English
- Weight
- 254 KB
- Volume
- 2
- Category
- Article
- ISSN
- 0364-9024
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π SIMILAR VOLUMES
A well-known Tutte's theorem claims that every 3-connected planar graph has a convex embedding into the plane. Tutte's arguments also show that, moreover, for every nonseparating cycle C of a 3-connected graph G, there exists a convex embedding of G such that C is a boundary of the outer face in thi
## 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
Generalizing a theorem of Moon and Moser. we determine the maximum number of maximal independent sets in a connected graph on n vertices for n sufficiently large, e.g., n > 50. = I .32. . .). Example 1.2. Let b, = i(C,), where C,z denotes the circuit of length n. Then b, = 3, 6, = 2, b, = 5, and b,
## Abstract In the set of graphs of order __n__ and chromatic number __k__ the following partial order relation is defined. One says that a graph __G__ is less than a graph __H__ if __c__~__i__~(__G__) β€ __c__~__i__~(__H__) holds for every __i__, __k__ β€ __i__ β€ __n__ and at least one inequality is
## 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₯