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Duality (Posted on 2009-06-21) Difficulty: 5 of 5

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Solution Solution | Comment 1 of 2
All the propositions in projective geometry occur in pairs such that by interchanging the words point and line in one immediately infers its pair.

There was an error in the problem setup. N's in the solution translate to E and T in the puzzle, but two E's occur without alternating to the T. The sum of E's and T's still total the 12 N's, so just a mistake in setup.

  Posted by webster726 on 2009-06-23 18:04:04
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