Power Residue
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.
Power Residue
If the congruence xn = a (mod m) has a solution, then a is called a power residue of m of the nth order. Here, n is an integer greater than 1, and m is an integer. When n = 2, a is said to be a quadratic residue of m; when n = 3, a is a cubic residue of m; and when n = 4, a is a biquadratic residue of m.
REFERENCE
Vinogradov, I. M. Osnovy teorii chisel, 8th ed. Moscow, 1972.The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.