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When I Import an EPS file, bezier curves are converted into something like this:

Graphics[JoinedCurve[
  {{{1, 4, 3}}}, {{{0., 0.}, {1., -1.}, {2., 1.}, {3.,  0.}}}, CurveClosed -> {0}]]

Here JoinedCurve contains no curve segments but two lists, but such a representation is not documented in the reference: http://reference.wolfram.com/mathematica/ref/JoinedCurve.html

I can see that the latter list represents the list of control points, and {{1, 4, 3}} seems to do with something like dimensions of the points, but what is the exact use of it?

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marked as duplicate by Yves Klett, Kuba, Sjoerd C. de Vries, halirutan, Simon Woods Oct 14 '13 at 8:11

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

    
Possible duplicate of mathematica.stackexchange.com/q/702/131 –  Yves Klett Oct 14 '13 at 6:51
    
More answers here: mathematica.stackexchange.com/questions/563/… –  Sjoerd C. de Vries Oct 14 '13 at 7:21

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