Graph Theory White Pages: Percy John Heawood On the fourcolour map theorem, Quart. J. Pure Appl. On extended congruencesconnected with the four-colour map theorem, Proc. London Math. http://www.cs.columbia.edu/~sanders/graphtheory/people/Heawood.PJ.html
Abstract For Talk: Robertson Colloquium Talk Neil Robertson. The fourcolour theorem. Abstract for the ColloquiumApril 22, 1999 at 430. That planar maps can be properly colored http://www.math.binghamton.edu/dept/ComboSem/abstract.19990422coll.html
Full List Of Dr Woodall's Papers The fourcolour theorem, Bull. Inst. Math. Appl. 14 (1978), 245-249.The four-colour theorem, Mathematical Spectrum 11 (1979), 69 http://www.maths.nottingham.ac.uk/personal/drw/papers.html
Ideas, Concepts, And Definitions four Color theorem. (See also The Mathematics Behind the Maps, The MostColorful Math of All, and The Story of the Young Map Colorer.). http://www.c3.lanl.gov/mega-math/gloss/math/4ct.html
The Four Color Theorem The four Color theorem. How many different colors are sufficient tocolor the countries on a map in such a way that no two adjacent http://www.mathpages.com/home/kmath266/kmath266.htm
GT Combinatorics Seminar It is well known that the case $k=5$ is equivalent to the four ColourTheorem, as proved by Wagner in 1937. About 60 years later http://www.math.gatech.edu/~ciucu/cosem/f01/sched.html
Fourier Transform From FOLDOC Fourier transform. mathematics A technique for expressing a waveformas a weighted sum of sines and cosines. Computers generally http://wwwacs.gantep.edu.tr/foldoc/foldoc.cgi?Fourier transform