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Old 2007-09-18, 10:00   #7
davieddy
 
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"Lucan"
Dec 2006
England

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Quote:
Originally Posted by cheesehead View Post
I meant that that proof _is_ by geometry, not calculus. Newton didn't run around proving everything by means of his new calculus; geometric proofs are common in Principia. I guess my "of course" was misleading.
Did he use my trick?
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