Can Path Metric on a Compact Set be Non-Compact?

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  • Опубліковано 11 січ 2025

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  • @heartpiecegaming8932
    @heartpiecegaming8932 3 місяці тому +1

    I think the answer is a no. If you take the topologists sine curve, together with adjoining the two end points of the sine curve via a different route, then the resulting set is rectifiably connected but has infinite diameter (with respect to the rectifiable curve metric you introduced).

  • @bagalo
    @bagalo 3 місяці тому +1

    My guess is to look at a closed, bounded subset of R^2 with an inward cusp. Like the closure of the bounded component of a standard cardioid. There can be no bilipschitz map of this set to the same set but with the length metric.

    • @BehnamEsmayli
      @BehnamEsmayli 3 місяці тому

      Yes. But is the length distance not compact? For example, is it not true that every sequence has a convergent subsequence?

  • @TolulopeOriowo
    @TolulopeOriowo 2 місяці тому

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