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===[[Calculus]]===
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===[[Prime number]]===
The discovery of the branch of [[mathematics]] known as '''calculus''' was motivated by two classical problems: how to find the [[slope]] of the [[tangent line]] to a curve at a [[point]] and how to find the [[area]] bounded by a curve.  What is surprising is that these two problems are fundamentally connected and, together with the notion of limits, can be used to analyse instantaneous [[rate]]s of change, accumulations of change, [[volume]]s of irregular [[solid]]s, and... [[Calculus|[more]]]
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A '''prime number''' (or simply '''prime''') is a [[positive integer]] <math>p>1</math> whose only positive [[divisor | divisors]] are 1 and itself. 
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Note that <math>1</math> is usually defined as being neither prime nor [[composite number|composite]] because it is its only factor among the [[natural number|natural numbers]].
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The [[Sieve of Eratosthenes]] is a relatively quick method for... [[Prime number|[more]]]
 
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Revision as of 20:10, 7 December 2007

Prime number

A prime number (or simply prime) is a positive integer $p>1$ whose only positive divisors are 1 and itself. Note that $1$ is usually defined as being neither prime nor composite because it is its only factor among the natural numbers. The Sieve of Eratosthenes is a relatively quick method for... [more]