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Is a symmetric matrice allways nonsingular?

  1. Aug 5, 2009 #1
    Can someone confirm this? If so, are there any respected websites on the net that can confirm this theorem?
  2. jcsd
  3. Aug 5, 2009 #2

    D H

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    Staff Emeritus
    Science Advisor

    No. Example: The zero matrix is symmetric.
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