File:Sigma formula.PNG
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Sigma_formula.PNG (352 × 135 pixels, file size: 7 KB, MIME type: image/png)
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 15:30, 28 March 2019 | | 352 × 135 (7 KB) | S169940 (talk | contribs) |
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