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{{GA nominee|20:55, 17 October 2021 (UTC)|nominator=[[User:David Eppstein|David Eppstein]] ([[User talk:David Eppstein|talk]])|page=1|subtopic=Mathematics and mathematicians|status=onreview|note=}}
{{maths rating|class=B|priority=low}}
In all articles found the formula for the square pyramidal number is proofed by using the inductive methode. Isn't there a direct proof?
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I don't see any mention of Archimedes, who probably gave the first formula for the sum of squares of the first n natural numbers in his book 'On Spirals'. It doesn't at first sight look like the modern formula, and the derivation is horribly complicated, but it is there after all. See the discussion in Heath's edition of Archimedes, especially on page 109 in the Dover edition.[[Special:Contributions/2A00:23C8:7906:1301:A453:48F9:36D5:B594|2A00:23C8:7906:1301:A453:48F9:36D5:B594]] ([[User talk:2A00:23C8:7906:1301:A453:48F9:36D5:B594|talk]]) 21:23, 7 March 2021 (UTC)
:Added. I used the 1897 edition rather than the Dover edition, but the pagination is the same. —[[User:David Eppstein|David Eppstein]] ([[User talk:David Eppstein|talk]]) 00:43, 8 March 2021 (UTC)
{{Talk:Square pyramidal number/GA1}}
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