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I need to include some graphical proofs of quantum groups theorem, looking like the one below:

wanted

It's very similar to the braids package, but I also need to include operators, like the S in the circle. So, is there any easy way to draw a circle in given braids package?

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    Could you give a minimal working example, drawing one of the raw pictures above with the mentioned package. This would help us a lot to help you. – JMP May 12 '16 at 15:01
  • Save the coordinates and add the circles afterwards seems the most straightforward. By the way, all I see under looking like the one below is wanted in red. – cfr May 13 '16 at 22:52

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