Every planar map is four colorable
K. Appel and W. Haken
Source: Bull. Amer. Math. Soc. Volume 82, Number 5
(1976), 711-712.
First Page:
Show
Hide
Primary Subjects:
05C15
Full-text: Open access
Links and Identifiers
Permanent link to this document: http://projecteuclid.org/euclid.bams/1183538218
Mathematical Reviews number (MathSciNet): MR0424602
Zentralblatt MATH identifier: 0331.05106
References
1.. F. Allaire and E. R. Swart, A systematic approach to the determination of reducible configurations, J. Combinatorial Theory Ser. B (to appear).
Zentralblatt MATH: 0398.05034
2. K. Appel and W. Haken, The existence of unavoidable sets of geographically good configurations, Illinois J. Math. 20 (1976), 218-297.
Zentralblatt MATH: 0322.05141
Mathematical Reviews (MathSciNet): MR392641
3. H. Heesch, Untersuchungen zum Vierfarbenproblem, B. I. Hochschulskripten, 810/810a/810b, Bibliographisches Institut, Mannheim, 1969. MR 40 #1303.
Zentralblatt MATH: 0187.20904
Mathematical Reviews (MathSciNet): MR248048
4. W. Tutte and H. Whitney, Kempe chains and the four color problem, Utilitas Math. 2 (1972), 241-281. MR 46 #8887.
Zentralblatt MATH: 0253.05120
Mathematical Reviews (MathSciNet): MR309782
Bulletin of the American Mathematical Society
