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A theorem concerning approximation on the sphere

✍ Scribed by П. И. ЛИЗОРКИН; С. М. никольский

Book ID
111887160
Publisher
Springer
Year
1983
Tongue
English
Weight
534 KB
Volume
9
Category
Article
ISSN
0133-3852

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A seven-color theorem on the sphere
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✍ Hudson V. Kronk; John Mitchem 📂 Article 📅 1973 🏛 Elsevier Science 🌐 English ⚖ 731 KB

Ringel has shown that the set of vertices and regions of any norm:4 map on the sphere can be admissibly colored by six colors. In this paper, it is shown that the set of vertices, edges and regions of any normd map on the sphere tit? be admissibly colored with seven colors.