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- ...eatly and compactly. Besides being easier to write than the explicit sum, sigma notation is also useful in that it shows the general form of each addend. ...is written ''under'' the sigma and the ''upper'' one is written above the sigma.2 KB (335 words) - 16:17, 8 February 2024
- 144 bytes (23 words) - 18:11, 3 September 2024
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- *[[SIGMA]] is a 5 round 8 question 30 minute competition for 5th-9th graders with di7 KB (805 words) - 08:26, 17 November 2024
- * [[Sigma Pi Sigma]]2 KB (229 words) - 11:37, 8 July 2019
- ...math> must satisfy certain properties (it must be a [[sigma-algebra|<math>\sigma</math>-algebra]]) to qualify as a class of events. Together, <math>\Omega</4 KB (590 words) - 10:52, 28 September 2024
- * <math>\sigma(n) < e^\gamma n\log_{\log_n}</math> for all <math>n > 5040</math>. This be2 KB (425 words) - 02:18, 29 June 2024
- ...used for <math>\sigma_0</math>, the number of divisors, and simply <math>\sigma</math> for <math>\sigma_1</math>. '''Shnirelman's density''': <math>\sigma(A) : =\inf_{n \to \infty} \frac{a(n)}{n}</math>8 KB (1,401 words) - 12:11, 17 June 2008
- | <math>\sigma</math>||\sigma||<math>\varsigma</math>||\varsigma||<math>\tau</math>||\tau||<math>\upsilon | <math>\Xi</math>||\Xi||<math>\Pi</math>||\Pi||<math>\Sigma</math>||\Sigma||<math>\Upsilon</math>||\Upsilon16 KB (2,315 words) - 19:35, 4 November 2024
- ~sigma3 KB (499 words) - 17:52, 21 November 2022
- | <math>\Sigma</math> | <math>\sigma</math>1 KB (216 words) - 09:58, 12 July 2006
- <math>(\Sigma x_i /4, \Sigma y_i /4)</math> is the centroid, which generates <math>(19,99)</math>, so th3 KB (423 words) - 10:06, 27 April 2023
- ...se the symbol for intersection in the way one uses a capital sigma (<math>\Sigma</math>) for sums, i.e. <math>\bigcap_{i = 1}^n A_i = A_1 \cap A_2 \cap \ldo1 KB (221 words) - 21:41, 11 April 2019
- ...eatly and compactly. Besides being easier to write than the explicit sum, sigma notation is also useful in that it shows the general form of each addend. ...is written ''under'' the sigma and the ''upper'' one is written above the sigma.2 KB (335 words) - 16:17, 8 February 2024
- ...> is a [[function]], is denoted <math>\sum_{i=a}^bf(i)</math>. (See also [[Sigma notation]])2 KB (309 words) - 19:34, 4 July 2019
- ...ion is a method used to represent the product of terms. It is similar to [[Sigma notation]] but uses a capital letter Pi.424 bytes (85 words) - 16:23, 8 February 2024
- erm what the sigma489 bytes (68 words) - 15:00, 27 September 2024
- ...]]s of the integer <math>n</math>, the [[sum of divisors function]] <math>\sigma(n)</math> that gives the sum of divisors of the integer <math>n</math> (and3 KB (450 words) - 11:59, 21 July 2009
- ...style n </math> such that there exists a permutation <math> \displaystyle \sigma </math> on the set <math> \{ 1, \ldots, n \} </math> for which \sqrt{\sigma(1) + \sqrt{\sigma(2) + \sqrt{ \cdots + \sqrt{\sigma(n)}}}}2 KB (297 words) - 22:44, 4 May 2007
- ...math>n </math> natural numbers such that <math> a_{\sigma(1)} , \ldots a_{\sigma(n)} </math> is an increasing sequence. Then we have a_{\sigma(n)} - a_{\sigma(1)} &=\sum_{i=1}^{n-1} \left| a_{\sigma(i+1)} - a_{\sigma(i)} \right| \qquad \quad \3 KB (448 words) - 16:58, 20 August 2008
- ...displaystyle \sigma(j+1) > \sigma(j) </math>, let <math> \displaystyle a_{\sigma(j+1)} </math> be <math> \displaystyle i+1 </math>. This ensures that if <m2 KB (361 words) - 12:37, 2 January 2007
- ...itive integers <math>n </math> such that there exists a permutation <math>\sigma </math> on the set <math> \{ 1, \ldots, n \} </math> for which \sqrt{\sigma(1) + \sqrt{\sigma(2) + \sqrt{ \cdots + \sqrt{\sigma(n)}}}}4 KB (682 words) - 19:27, 15 September 2024
- ...ma\frac{1}{r}\frac{\partial U}{\partial n} ds</math>||\frac{1}{4\pi}\oint_\Sigma\frac{1}{r}\frac{\partial U}{\partial n} ds12 KB (1,798 words) - 20:55, 22 September 2024