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Puzzled by a word

  1. Sep 10, 2010 #1
    im puzzled by a word read as 'afagnal'. if 2 vectors(H&T) are 'afagnor' to each other, <H|T>=0. i failed to google it out.How to spell this word presicely and what is the meaning? Is anybody can help?
  2. jcsd
  3. Sep 10, 2010 #2

    D H

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    The word is orthogonal.
  4. Sep 10, 2010 #3
    thank you very much!
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