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Remove in Matrix

  1. Feb 25, 2014 #1
    We have a matrix A4x5 and B2x3 can we remove(-) them A-B

    Thanks
     
  2. jcsd
  3. Feb 25, 2014 #2

    HallsofIvy

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    That depends upon what you mean by "remove". Normally "-" means "subtract". That is defined only for matrices with the same number of rows and columns.

    If you mean [itex]a_{ij}- b_{ij}[/itex], taking [itex]b_{ij}= 0[/itex] if i> 2 and j> 3, you can define that (you can define anything) but it will not obey any of the usual algebraic rules- so probably won't be of much use.
     
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