### Topic Pages

##### Apollonius, of Perga

Place : Greece Subject : biography, maths and statistics Greek mathematician whose treatise on conic sections represents the final flowering of Greek

##### Arago, F. (François), 1786-1853

Place : France Subject : biography, physics French scientist who made contributions to the development of many areas of physics and astronomy, the

##### Area measurement

The amount of space that a closed polygon encloses is the area of the polygon. Area is measured in “square units.” In other words, the square is the

##### Arithmetic

Branch of mathematics concerned with the study of numbers and their properties. The fundamental operations of arithmetic are addition, subtraction,

##### Arithmetic mean

The mean is a parameter that measures the central location of the distribution of a random variable and is an important statistic that is widely

##### Arithmetic progression

A sequence in which each term (except the first) differs from the previous one by a constant amount, the common difference . If the first term is a

##### Arnauld, Antoine, 1612-1694

A French Roman Catholic theologian and philosopher. Arnauld was born in Paris into a family associated with Jansenism. Angelique Arnauld, his sister,

##### Artin, Emil, 1898-1962

Austrian mathematician. Artin, who made important contributions to the development of class field theory and the theory of hypercomplex numbers, was

##### Averroës, 1126-1198

Averroës was born into a learned Cordoban family of judges only a few years after the death of al-Ghazalt, the Iranian exphilosopher who wrote The

##### Axioms

in mathematics and logic, general statement accepted without proof as the basis for logically deducing other statements (theorems). Examples of axioms