Anthony Quas's user avatar
Anthony Quas's user avatar
Anthony Quas's user avatar
Anthony Quas
  • Member for 4 years, 3 months
  • Last seen more than 2 years ago
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The pic is the phase portrait of a simple "piecewise isometry". Define a map by sliding the two halves of the plane: the top half to the right; the lower half to the left and then rotate. Around each periodic point of the map there's a "periodic island". These are what are in the image...
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