penrose.cs.cmu.edu on Hacker News
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Penrose – Create diagrams by typing notation in plain text(penrose.cs.cmu.edu)
441 points by kiyanwang | 108 comments
Homepage of Penrose, a CMU project for creating mathematical diagrams by writing plain-text notation, with examples, tutorial, and online editor.
Penrose 3.0(penrose.cs.cmu.edu)
207 points by sestep | 34 comments