number
The Real NumbersThe real numbers are those representable by an infinite decimal expansion, which may be repeating or nonrepeating; they are in a onetoone correspondence with the points on a straight line and are sometimes referred to as the continuum. Real numbers that have a nonrepeating decimal expansion are called irrational, i.e., they cannot be represented by any ratio of integers. The Greeks knew of the existence of irrational numbers through geometry; e.g., Sections in this article:
The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2012, Columbia University Press. All rights reserved. More on number The Real Numbers from Fact Monster:
See more Encyclopedia articles on: Mathematics 
24 X 7Private Tutor
Best Website for Science Help & Chemistry Help
