Look up number in Wiktionary, the free dictionary.
A number is a mathematical concept used to describe and assess quantity. Wikipedia does not have an article with this exact name. ... Wiktionary logo Wiktionary is a sister project to Wikipedia intended to be a free wiki dictionary (including thesaurus and lexicon) in every language. ... Number is the current mathematics collaboration of the week! Please help improve it to featured article standard. ...
Number may also be:
Grammatical number, a morphological grammatical category indicating the quantity of referents
Number (music), a self-contained piece of music that is combined with other such pieces in a performance
An adjective describing a greater degree of numbness
This is a disambiguation page: a list of articles associated with the same title. If an internal link referred you to this page, you may wish to change the link to point directly to the intended article.
A new number was invented, the square root of negative one, denoted by i, a symbol assigned to this new number by Leonhard Euler.
The arithmetical operations of numbers, such as addition, subtraction, multiplication and division, are generalized in the branch of mathematics called abstract algebra, the study of abstract number systems such as groups, rings and fields.
The existence of complex numbers was not completely accepted until the geometrical interpretation had been described by Caspar Wessel in 1799; it was rediscovered several years later and popularized by Carl Friedrich Gauss, and as a result the theory of complex numbers received a notable expansion.
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