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## Homework Statement

Lets say A = a matrix.

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

I dont understand what the I means and im only given one matrix.... a 3x3 matrix listed as A

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- Thread starter ssb
- Start date

- #1

- 120

- 0

Lets say A = a matrix.

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

I dont understand what the I means and im only given one matrix.... a 3x3 matrix listed as A

Last edited:

- #2

Dick

Science Advisor

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

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