Identity

Matrix Multiplication: 4 of 16

Library › Matrix Multiplication

1. Calculate

2. Complexity

3. Shape

4. Identity

5. Scale

6. Shift

7. Combine Rows

8. Combine Columns

9. Not Commutative

10. Associative

11. Distributive

12. Chain

13. Transpose

14. Inverse

15. Linear Equations

16. Tiled Algorithm

In this chapter you will practice multiplying by the identity matrix I. The identity has 1s down its diagonal and 0s everywhere else, so A · I returns A unchanged. It is the matrix version of multiplying by one, and a handy check that your by-hand steps are right.

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The rest of the chapter (Page 72 ~ 76) and the solutions are available to AI by Hand Academy members. You can become a member via a paid Substack subscription.