Kempe Chain

In mathematics, a Kempe chain is a device used mainly in the study of the four colour theorem.

Read more about Kempe Chain:  History, Formal Definition, Other Applications

Famous quotes containing the word chain:

    “The years seemed to stretch before her like the land: spring, summer, autumn, winter, spring; always the same patient fields, the patient little trees, the patient lives; always the same yearning; the same pulling at the chain—until the instinct to live had torn itself and bled and weakened for the last time, until the chain secured a dead woman, who might cautiously be released.”
    —Willa Cather (1873–1947)