Quadratic Assignment Problem - Formal Mathematical Definition

Formal Mathematical Definition

The formal definition of the quadratic assignment problem is as follows:

Given two sets, P ("facilities") and L ("locations"), of equal size, together with a weight function w : P × PR and a distance function d : L × LR. Find the bijection f : PL ("assignment") such that the cost function:
is minimized.

Usually weight and distance functions are viewed as square real-valued matrices, so that the cost function is written down as:

Read more about this topic:  Quadratic Assignment Problem

Famous quotes containing the words formal, mathematical and/or definition:

    The spiritual kinship between Lincoln and Whitman was founded upon their Americanism, their essential Westernism. Whitman had grown up without much formal education; Lincoln had scarcely any education. One had become the notable poet of the day; one the orator of the Gettsyburg Address. It was inevitable that Whitman as a poet should turn with a feeling of kinship to Lincoln, and even without any association or contact feel that Lincoln was his.
    Edgar Lee Masters (1869–1950)

    What he loved so much in the plant morphological structure of the tree was that given a fixed mathematical basis, the final evolution was so incalculable.
    —D.H. (David Herbert)

    It is very hard to give a just definition of love. The most we can say of it is this: that in the soul, it is a desire to rule; in the spirit, it is a sympathy; and in the body, it is but a hidden and subtle desire to possess—after many mysteries—what one loves.
    François, Duc De La Rochefoucauld (1613–1680)