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Equivalence of closed 1-forms on closed nonorientable surfaces

✍ Scribed by N.V. Budnyts’ka


Publisher
Springer US
Year
2009
Tongue
English
Weight
187 KB
Volume
12
Category
Article
ISSN
1536-0059

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Chromatic numbers of quadrangulations on
✍ Dan Archdeacon; Joan Hutchinson; Atsuhiro Nakamoto; Seiya Negam; Katsuhiro Ota 📂 Article 📅 2001 🏛 John Wiley and Sons 🌐 English ⚖ 138 KB

## Abstract It has been shown that every quadrangulation on any nonspherical orientable closed surface with a sufficiently large representativity has chromatic number at most 3. In this paper, we show that a quadrangulation __G__ on a nonorientable closed surface __N~k~__ has chromatic number at le