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Sections

Matrices

Pick a section. You read the idea first, then answer questions on it.

1. A grid of numbers, treated as one object1 ideaRead

2. Order, entries, and named matrix shapes2 ideasRead

3. Transpose, symmetric, and skew-symmetric matrices1 ideaRead

4. Adding matrices and scaling by a number2 ideasRead

5. Row times column2 ideasRead

6. What survives, what doesn’t1 ideaRead

7. A B is not B A2 ideasRead

8. Invertible matrices1 ideaRead

9. Symmetric plus skew-symmetric2 ideasRead

10. A B = 0 does not force A = 0 or B = 02 ideasRead

11. One object, its own arithmetic1 ideaRead

12. Practice set5 ideasRead