The limit is also a Besicovitch set

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送交者: lightman 于 2009-01-15, 15:24:24:

回答: Thanks for the info. It talks about, however, 由 LaoXiao 于 2009-01-15, 12:16:34:

The point is that the set is defined as one that contains a line with unit length in each direction. It doesn't say anything about turning the line. My guess is to turn the line it may need positive measure.


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