For an undirected graph G=(V, E) and a collection S of disjoint subsets of V, an S-path is a path connecting different sets in S. We give a short proof of Mader's min-max theorem for the maximum number of disjoint S-paths. 2001
A short proof of a theorem of dirac's about hadwiger's conjecture
β Scribed by D. R. Woodall
- Publisher
- John Wiley and Sons
- Year
- 1992
- Tongue
- English
- Weight
- 105 KB
- Volume
- 16
- Category
- Article
- ISSN
- 0364-9024
No coin nor oath required. For personal study only.
β¦ Synopsis
Abstract
A Short proof is given of the theorem that every grph that does not have K~4~ as a subcontraction is properly vertex 3βcolorable.
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