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1.
Every planar map is four colorable/ Kenneth Appel, and Wolfgang Haken. by
  • Appel, Kenneth I, 1932-
  • Haken, Wolfgang
Series: Contemporary mathematics (American Mathematical Society) ; v. 98.
Publication details: Providence, R.I.: American Mathematical Society, c1989
Availability: Items available for loan: Castorina (2).

2.
Der Vierfarbensatz: Geschichte, topologische Grundlagen, und Beweisidee/ von Rudolf Fritsch, unter Mitarbeit von Gerda Fritsch. by
  • Fritsch, Rudolf, 1939-
  • Fritsch, Gerda
Publication details: Mannheim: B.I. Wissenschaftsverlag, c1994
Availability: Items available for loan: Castorina (1)Call number: 514 F919v 1994 IMPA.

3.
Nouvelles réductions dans le problème des quatre couleurs. by
  • Mayer, Jean, mathematician
Series: Cahiers mathématiques Montpellier ; 1
Publication details: Montpellier: U.E.R. de Mathemátiques, 1974
Availability: Items available for loan: Castorina (1).

4.
The four-color problem: assaults and conquest/ Thomas L. Saaty and Paul C. Kainen. by
  • Saaty, Thomas L
  • Kainen, Paul C
Publication details: New York: Dover, 1986
Availability: Items available for loan: Castorina (2)Call number: 511.5 S112f 1996 IMPA, ...

5.
Graphs, colourings, and the four-colour theorem/ Robert A. Wilson. by
  • Wilson, Robert, 1958-
Series: Oxford science publications
Publication details: Oxford: New York: Oxford University Press, 2002
Availability: Items available for loan: Castorina (1)Call number: 511.5 W752g 2002 IMPA.

6.
Four colors suffice: how the map problem was solved/ Robin Wilson. by
  • Wilson, Robin J
Publication details: Princeton, N.J.: Princeton University Press, 2002
Other title:
  • Four colours suffice
Availability: Items available for loan: Castorina (1)Call number: 510.9 W752f 2002 IMPA.

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