[plt-scheme] Diagram Library

From: Karl Winterling (kwinterling at gmail.com)
Date: Fri Jan 8 19:40:47 EST 2010

I'd really like to see a pict library for drawing graphs (as in graph
theory), commutative diagrams (i.e., labeled digraphs), etc. Does
anything like this exist on PLaneT? It seems somewhat challenging to
write something like this that optimizes edge and vertex placement for


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