Cubing a matrix

  • Thread starter John777
  • Start date
  • #1
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1
To cube the matrix [A] I assume you square it and then multiply the result by [A] however in matrix multiplication order matters:

so which is correct?

[A]^3 = [A]^2[A] or [A][A]^2
 

Answers and Replies

  • #2
rock.freak667
Homework Helper
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31
They are the same.

In the end you are just doing [A][A][A]
 
  • #3
Dick
Science Advisor
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619
It doesn't matter. (A*A)*A=A*(A*A). Matrix multiplication may not be commutative, but it is associative.
 

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