Graph colouring

<application> A constraint-satisfaction problem often used as a test case in research, which also turns out to be equivalent to certain real-world problems (e.g. register allocation).

Given a connected graph and a fixed number of colours, the problem is to assign a colour to each node, subject to the constraint that any two connected nodes cannot be assigned the same colour.

This is an example of an NP-complete problem.

See also four colour map theorem.

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Grapes Grapevine graph Graph Algorithm and Software Package graph coloring	constraint satisfaction graph coloring register allocation	Graphic ALGOL Graphical Kernel System Graphical User Interface Graphic Display Interface Graphic Language