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Feb 29 at 2:27 comment added David Roberts (Please note that the comment by nivram was converted to a comment in Feb 2024, after sitting as an "answer" to the question for nearly 14 years)
S Feb 28 at 21:30 history suggested The Amplitwist CC BY-SA 4.0
fixed broken link to Wikipedia
Feb 28 at 20:53 review Suggested edits
S Feb 28 at 21:30
Apr 8, 2010 at 5:41 comment converted from answer nivram I find this proof (of Sergei Ivanov) quite interesting. Was it cooked up from scratch just to answer the question, or do similar ideas appear in some other context? Any references would be appreciated.
Apr 6, 2010 at 17:17 vote accept Sidney Raffer
Apr 6, 2010 at 16:19 history answered Sergei Ivanov CC BY-SA 2.5