### Topic Pages

##### Data

The term data refers to a collection of information. A more detailed definition includes types of data that combine to be the collected information

##### Data mining

Modern researchers in various fields are confronted by an unprecedented wealth and complexity of data. However, the results available to these

##### Debreu, Gerard

French-born US economist. He developed mathematical economic models with US economist Kenneth Arrow , and in 1954 they published an epoch-making paper

##### Decimal

A number expressed using the decimal number system . Commonly, the term is used for numbers that have fractional parts indicated by a decimal point. A

##### Decimal system

Most commonly used number system, to the base ten. Decimal numbers do not necessarily contain a decimal point; 563, 5.63, and −563 are all decimal

##### Dedekind, Richard (1831 - 1916)

German mathematician who made contributions to number theory. In 1872 he introduced the Dedekind cut (which divides a line of infinite length

##### Descartes, René

( rənā' dākärt' ), Lat. Renatus Cartesius, 1596–1650, French philosopher, mathematician, and scientist, b. La Haye. Descartes' methodology was a major

##### determinant

a polynomial expression that is inherent in the entries of a square matrix . The size n of the square matrix, as determined from the number of entries

##### differential geometry

branch of geometry in which the concepts of the calculus are applied to curves, surfaces, and other geometric entities. The approach in classical

##### Dislocation

Displacement of bones meeting at a joint. It causes pain, swelling, loss of function, and deformity. It is usually due to an accident, but may be