Sigma (Greek letter)

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Revision as of 16:16, 22 November 2008 by imported>Bruce M. Tindall (New page: '''Sigma''' is the 18th letter of the Greek alphabet. It is written as <math>\Sigma</math> (upper-case) and <math>\sigma</math> (lower-case).)

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Sigma is the 18th letter of the Greek alphabet. It is written as $\Sigma$ (upper-case) and $\sigma$ (lower-case).

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