Illinois Journal of Mathematics
- Illinois J. Math.
- Volume 21, Issue 3 (1977), 491-567.
Every planar map is four colorable. Part II: Reducibility
K. Appel, W. Haken, and J. Koch
Article information
Source
Illinois J. Math., Volume 21, Issue 3 (1977), 491-567.
Dates
First available in Project Euclid: 20 October 2009
Permanent link to this document
https://projecteuclid.org/euclid.ijm/1256049012
Mathematical Reviews number (MathSciNet)
MR0543793
Zentralblatt MATH identifier
0387.05010
Subjects
Primary: 05C15: Coloring of graphs and hypergraphs
Citation
Appel, K.; Haken, W.; Koch, J. Every planar map is four colorable. Part II: Reducibility. Illinois J. Math. 21 (1977), no. 3, 491--567. https://projecteuclid.org/euclid.ijm/1256049012
