What is the Hollow I Symbol?

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misterau

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Homework Statement


http://img40.imageshack.us/img40/6421/57065635.jpg [Broken]

The Attempt at a Solution


I just what to know what the hollow I symbol is?
Is it just
1 0 0
0 1 0
0 0 1
Thank you!
 
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  • #2
Yes, it is the identity matrix.
 

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