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Null space question

  1. Jan 3, 2009 #1
    got a question show that the null space of T is a vector space of U given the mapping T:U->V

    i know that null space or kernal of T is kerT={uEU: T(u)=0} and is a subset of U but dont have a clue where to start applying this to my question?
  2. jcsd
  3. Jan 3, 2009 #2


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    Well, how do you show that a subset of U is a subspace of U?
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