Old 12-11-2011, 04:59 PM
  #4  
Krisb
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Join Date: Aug 2011
Location: Asheville, previously Lake Vermilion, Tarpon Springs, Duluth, St Paul, Soudan
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Here's another site.

http://www.spoonflower.com/tags/math

Also, lots of math/science people are really into tesselation, or Escher-like patterns.
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