Note: Image shows symmetric patterns (blue lines) constructed from decorated tiles (green, red and blue shapes); courtesy of W. B. Denny.
As early as the 15th century, elaborate symmetrical tile work on medieval Islamic buildings contained patterns straight out of modern math
Note: Image shows symmetric patterns (blue lines) constructed from decorated tiles (green, red and blue shapes); courtesy of W. B. Denny.
Deadline: Jun 30 2013
Reward: $1,000,000 USD
This is a Reduction-to-Practice Challenge that requires written documentation and&
Deadline: Jun 29 2013
Reward: $7,000 USD
The Seeker for this Challenge desires proposals for chemical methods that could rapidly degrade a dilute aqueous solution
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