0 (number)

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Revision as of 10:29, 31 January 2008 by imported>Jitse Niesen (rewrite first sentences, to get rid of the mysterious "It is also the numerical digit which represents itself." (see talk))
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0 (zero) is a real number and is the integer between 1 and -1, which signifies a value of nothing. It is also a numerical digit and used as a placeholder for place value systems.

History

The number zero was invented twice - once in India and once in Mesoamerica. This invention is considered especially significant because it required a considerable cognitive leap to achieve and because it opened the door to a host of new applications for numbers.


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