A number is a mathematical object used to quantify (count and measure) and to represent quantity, in several forms, of which the most primitive, primary and simplest one is the symbolic signification of a particular, invariable, constant quantity. A notational symbol that represents a number is called a numeral but in common use, the word number can mean the abstract object, the symbol, or the word for the number. In addition to their use in counting and measuring, numerals are often used for labels (telephone? numbers), for ordering (serial numbers), and for codes (e.g., ISBNs). In mathematics, the definition of number has been extended over the years to include such numbers as zero, negative numbers, rational numbers, irrational numbers, and complex numbers.

Certain procedures that take one or more numbers as input and produce a number as output are called numerical operations. Unary operations take a single input number and produce a single output number. For example, the successor operation adds one to an integer?, thus the successor of 4 is 5. More common are binary operations, which take two input numbers and produce a single output number. Examples of binary operations include addition, subtraction, multiplication, division, and exponentiation?. The study of numerical operations is called arithmetic. (wikipedia)

The symbols for the digits 1 - 9 were derived from the ancient astrological symbols for the planets.

Where did numbers come from?

See Also

12.21 - Fibonacci Whole Numbers v Irrational Decimal near Equivalents
atomic number
Figure 3.00 - Infinite Number of Atomoles or Alphanon filling all Space
Indig Numbers
law of multiple proportions
law of constant composition
Law of Definite Proportions
mass number
Oxidation Number
proton number
Propositions of Geometry
Quantum Arithmetic
wave number

Created by Dale Pond. Last Modification: Sunday 24 of March, 2013 08:36:18 MDT by Dale Pond. (Version 3)
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