Linear Algebra (Matrices)

  • Thread starter ssb
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  • #1
ssb
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Homework Statement



Lets say A = a matrix.

What is meant by the question [tex]A - I_3[/tex] ?

I don't understand what the I means and I am only given one matrix... a 3x3 matrix listed as A
 
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Answers and Replies

  • #2
Dick
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I_3 is a 3x3 identity matrix - ones down the diagonal and zeros elsewhere.
 

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