a- Quick reference
Prefix meaning ‘not’. For example, an asymmetric figure is one which possesses no symmetry, which is not symmetrical.
A Quick reference
The number 10 in hexadecimal notation.
abacus Quick reference
A counting device consisting of rods on which beads can be moved so as to represent numbers.
Abel, Niels Henrik (1802–29) Quick reference
who, at the age of 19, proved that the general equation of degree greater than 4 cannot be solved algebraically.
abelian group Quick reference
Suppose that G is a *group with the operation ￮. Then G is abelian if the operation ￮ is