We shall give cohomological proofs of these results. Furthermore, we prove From this, we get Ž . THEOREM B. Let p s 2. If G is d-maximal, then cl G F 2 pro¨ided that one of the following conditions is satisfied:
On a Conjecture of Kahn for the Stiefel–Whitney Classes of the Regular Representation
✍ Scribed by Pham Anh Minh
- Publisher
- Elsevier Science
- Year
- 1997
- Tongue
- English
- Weight
- 221 KB
- Volume
- 188
- Category
- Article
- ISSN
- 0021-8693
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📜 SIMILAR VOLUMES
## Abstract A (plane) 4‐regular map __G__ is called __C__‐simple if it arises as a superposition of simple closed curves (tangencies are not allowed); in this case σ (__G__) is the smallest integer __k__ such that the curves of __G__ can be colored with __k__ colors in such a way that no two curves
On p. 272 of the above article, paragraph # 3 is incomplete. It should read as the following: Hence to prove Proposition 4 it is enough to show that the edges of Q 4 can be colored with 4 colors in such a way that each square has one edge of each color. Such a coloring is displayed on the following
a poset by saying u F ¨if u is on the path from r to ¨. Let Z P be the span of all matrices z such that u -¨, where z is the n = n matrix with a 1 in the u, ü¨P u ẅ x Ž .