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A bound for the orders of the torsion groups of surfaces withc12= 2- 1

✍ Scribed by Masaaki Murakami


Publisher
Springer-Verlag
Year
2006
Tongue
French
Weight
204 KB
Volume
253
Category
Article
ISSN
0025-5874

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A tighter bounding interval for the 1-ch
✍ Vladimir P. Korzhik πŸ“‚ Article πŸ“… 1997 πŸ› Elsevier Science 🌐 English βš– 889 KB

Let ~1(S) be the maximum chromatic number for all graphs which can be drawn on a surface S so that each edge is crossed over by no more than one other edge. In the previous paper the author has proved that F(S) -34 ~< ~1(S), where F(S) = [\_Β½(9 + ~/(81 -32E(S))).J is Ringel's upper bound for xl(S) a