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Found 50 results for "Four-color problem"

The four-color problem
The four-color problem

by Oystein Ore

1967 2 ed.
The four-color problem
The four-color problem

by Øystein Ore

1967 2 ed.
Four Colours Suffice
Four Colours Suffice

by Robin J. Wilson

Solving any type of puzzle, such as a jigsaw or crossword puzzle, can be enjoyed purely for relaxation and recreation, a...

2002 9 ed.
The four-color problem
The four-color problem

by óystein Ore

1967 1 ed.
The four-color problem
The four-color problem

by Oystein ore

1967 1 ed.