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A student of mine has cooked up a new graphical notation for computing with knots on surfaces. The trouble is, writing up his results is difficult due to his new notation. Is there a good "drawing tool" for mathematics that anyone can suggest?

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    It is not clear from your question, whether you're asking about software suitable for pictures and diagrams use in mathematics in general, or whether you're particularly interested in something suitable for knot theory. If it is the alter, then perhaps this question might be interesting for you: http://math.stackexchange.com/questions/58473/software-to-draw-links-or-knots2012-05-03
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    I'm interested in both. Thanks for the comment, Martin!2012-05-23

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