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Bulletin of the American Mathematical Society

Published by the American Mathematical Society, the Bulletin of the American Mathematical Society (BULL) is devoted to research articles of the highest quality in all areas of pure and applied mathematics.

ISSN 1088-9485 (online) ISSN 0273-0979 (print)

The 2020 MCQ for Bulletin of the American Mathematical Society is 0.47.

What is MCQ? The Mathematical Citation Quotient (MCQ) measures journal impact by looking at citations over a five-year period. Subscribers to MathSciNet may click through for more detailed information.

 

Every planar map is four colorable
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by K. Appel and W. Haken PDF
Bull. Amer. Math. Soc. 82 (1976), 711-712
References
    1.. F. Allaire and E. R. Swart, A systematic approach to the determination of reducible configurations, J. Combinatorial Theory Ser. B (to appear).
  • K. Appel and W. Haken, The existence of unavoidable sets of geographically good configurations, Illinois J. Math. 20 (1976), no. 2, 218–297. MR 392641, DOI 10.1215/ijm/1256049898
  • Heinrich Heesch, Untersuchungen zum Vierfarbenproblem, B. I. Hochschulskripten, vol. 810/810, Bibliographisches Institut, Mannheim-Vienna-Zürich, 1969 (German). MR 0248048
  • Hassler Whitney and W. T. Tutte, Kempe chains and the four colour problem, Utilitas Math. 2 (1972), 241–281. MR 309782
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Additional Information
  • Journal: Bull. Amer. Math. Soc. 82 (1976), 711-712
  • MSC (1970): Primary 05C15
  • DOI: https://doi.org/10.1090/S0002-9904-1976-14122-5
  • MathSciNet review: 0424602