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Homework Help: Linear algebra.Kernel of a linear mapping

  1. Jul 10, 2013 #1
    Let ##L## be a linear operator ::##L(A)= Tr(A)## where ##Tr(A)## is the trace of a square matrix
    Find a basis of the kernel of L.
    Any help would be really appreciated . thanks in advance
  2. jcsd
  3. Jul 10, 2013 #2


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    How about we start with the definition?
    If A is an nxn matrix, what does it mean for A to be in ker L?
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