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- Path: sparky!uunet!zaphod.mps.ohio-state.edu!caen!spool.mu.edu!agate!agate!dreier
- From: dreier@durban.berkeley.edu (Roland Dreier)
- Newsgroups: sci.math
- Subject: Re: Philosophy of Pi
- Date: 18 Dec 92 09:41:57
- Organization: U.C. Berkeley Math. Department.
- Lines: 24
- Message-ID: <DREIER.92Dec18094157@durban.berkeley.edu>
- References: <1992Dec14.144954.11447@sifon.cc.mcgill.ca>
- <1992Dec18.114450.22206@lth.se> <BzGovA.JzJ@news.cso.uiuc.edu>
- NNTP-Posting-Host: durban.berkeley.edu
- In-reply-to: brumleve@iboga's message of Fri, 18 Dec 1992 15:40:19 GMT
-
- In article <BzGovA.JzJ@news.cso.uiuc.edu> brumleve@iboga (Dan Brumleve) writes:
-
- dat92oma@ludat.lth.se (Ola Martensson) writes:
-
- >A friend and I discussed if you can find any integer anywhere
- >in the expansion of PI?
-
- >1415 , 92 etc is obvious BUT can you really find ALL integer
- >even unlimited ones???
-
- Hmm... I'd think that you would be able to find any integer in an
- irrational number. Not sure though.
-
- It is certainly false than one can find any integer in ANY irrational
- number. Consider the irrational number .101001000100001000001... (I
- leave it as an exercise to prove that this is irrational ;-) Now,
- certainly 2 does not appear in the decimal expansion of the number
- above.
-
- However, it is a very open question as to whether every integer
- appears in the decimal expansion of Pi. This is called the Goldbach
- conjecture, and I'm not aware of any real progress toward a solution.
- --
- Roland Dreier dreier@math.berkeley.edu
-