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A plane figure for which quadrature is possible is said to be quadrable.

If there is no integer 0<x<p such that x^2=q (mod p), i.e., if the congruence (35) has no solution, then q is said to be a quadratic nonresidue (mod p). If the congruence ...

((a+b)/2)^2-((a-b)/2)^2=ab.

A group G is quasi-unipotent if every element of G of order p is unipotent for all primes p such that G has p-group rank >=3.

A finite group L is quasisimple if L=[L,L] and L/Z(L) is a simple group.

The conjugate of a quaternion a=a_1+a_2i+a_3j+a_4k is defined by a^_=a_1-a_2i-a_3j-a_4k.

The norm n(a) of a quaternion a=a_1+a_2i+a_3j+a_4k is defined by n(a)=sqrt(aa^_)=sqrt(a^_a)=sqrt(a_1^2+a_2^2+a_3^2+a_4^2), where a^_=a_1-a_2i-a_3j-a_4k is the quaternion ...

A group of five elements, also called a quintuplet or pentad.

A group of five elements, also called a quintuple or pentad.

A module taking its coefficients in a ring R is called a module over R or R-module.