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Simple 3-polytopal graphs with edges of only two types and shortness coefficients

✍ Scribed by P.J Owens


Publisher
Elsevier Science
Year
1986
Tongue
English
Weight
468 KB
Volume
59
Category
Article
ISSN
0012-365X

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✦ Synopsis


We consider classes of simple 3-polytopal graphs whose edges are incident with either two 5-gons or a 5-gon and a q-gon (q > 5). We show that the shortness coefficient is less than one for all q 1> 28, settle a question raised by Jendrol and Tk~i~ in a recent paper in this journal and prove that all the graphs in these classes are cyclically 4-edge-connected.


πŸ“œ SIMILAR VOLUMES


Shortness coefficients of simple 3-polyt
✍ Michal TkÑč πŸ“‚ Article πŸ“… 1992 πŸ› Elsevier Science 🌐 English βš– 419 KB

TkSE, M., Shortness coefficients of simple 3-polytopal graphs with edges of only two types, Discrete Mathematics 103 (1992) 103-110. We consider two classes of simple 3-polytopal graphs whose edges are incident with either two S-gons or a 5-gon and q-gon (q = 26 or 27). We show that the shortness c

Pentagonal 3-polytopal graphs with edges
✍ Stanislav Jendrol'; Peter J. Owens πŸ“‚ Article πŸ“… 1995 πŸ› Elsevier Science 🌐 English βš– 510 KB

We consider the class of pentagonal 3-polytopal graphs all of whose edges are incident either with two 3-valent vertices or with a 3-valent vertex and a q-valent vertex. For most values of q, (i) we find a small non-hamiltonian graph in the class and (ii) we show that the shortness exponent of the c

5-regular 3-polytopal graphs with edges
✍ J. Harant; P.J. Owens; M. TkÑč; H. Walther πŸ“‚ Article πŸ“… 1996 πŸ› Elsevier Science 🌐 English βš– 309 KB

It is shown that, if q >/29 and q ~ 0 (mod 3), the infinite class of 5-regular 3-polytopal graphs whose edges are incident with either two triangles or a triangle and a q-gon contains nonhamiltonian members and even has shortness exponent less than one.

On the simplicial 3-polytopes with only
✍ Stanislav JendroΔΎ; Michal TkÑč πŸ“‚ Article πŸ“… 1984 πŸ› Elsevier Science 🌐 English βš– 492 KB

For some families of graphs of simplicial 3-polytopes with two types of edges structural properties are described, for other ones their cardinality is determined. ## 1. ln~oduction Griinbaum and Motzkin [3], Griinbaum and Zaks [4], and Malkevitch [6] investigated the structural properties of triva

Regular planar graphs with faces of only
✍ P. J. Owens πŸ“‚ Article πŸ“… 1984 πŸ› John Wiley and Sons 🌐 English βš– 931 KB

We construct a small non-Hamiltonian 3-connected trivalent planar graph whose faces are all 4-gons or 7-gons and show that the shortness coefficient of the class of such graphs is less than one. Then, by transforming non-Hamiltonian trivalent graphs into regular graphs of valency four or five, we ob