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- Path: sparky!uunet!mcsun!uknet!pavo.csi.cam.ac.uk!camcus!gjm11
- From: gjm11@cus.cam.ac.uk (G.J. McCaughan)
- Newsgroups: sci.math
- Subject: Re: What about 3.4 dimension?
- Message-ID: <1992Sep11.141332.19869@infodev.cam.ac.uk>
- Date: 11 Sep 92 14:13:32 GMT
- References: <Sep10.194827.29156@yuma.ACNS.ColoState.EDU> <1992Sep10.235019.834@infodev.cam.ac.uk>
- Sender: news@infodev.cam.ac.uk (USENET news)
- Organization: U of Cambridge, England
- Lines: 17
- Nntp-Posting-Host: bootes.cus.cam.ac.uk
-
- In article <1992Sep10.235019.834@infodev.cam.ac.uk>, I wrote:
-
- > Example: That famous "snowflake" thing you get as follows: The first "stage"
- > is just an equilateral triangle. The second is obtained by gluing on a 1/3-size
- > equilateral triangle onto the outside of each side of the triangle; this looks
- > like a Star of David. The third is obtained by gluing on a 1/9-size triangle
- > to the outside of each line segment making up the new figure. And so on, adding
- > more and smaller triangles every time.
- > If you think of this as a "filled-in" shape, it has dimension 2. (This is easy
- > to prove.) But what about the boundary? That actually has dimension 4/3, and
- ^^^^^^^^^^^^^
- NO NO NO NO!!! Wrong! I beg your collective pardon; I should have said
- log 4/log 3. (But the idea is the important thing.)
-
- --
- Gareth McCaughan Dept. of Pure Mathematics & Mathematical Statistics,
- gjm11@cus.cam.ac.uk Cambridge University, England. [Research student]
-