Announcement
- HW1 returned. 10 points per problem. Total 100 points.
Some common problems:
- BR 4.7: $\mathcal{X} \cup {\mathbf{y}} = \mathcal{X}$?
- BR 5.7: show existence of $\mathbf{A} = \mathbf{u} \mathbf{v}â$ where $\text{rank}(\mathbf{A})=1$.
- BR 5.10: $\text{rank}(\mathbf{A} \mathbf{B}) < \min {\text{rank}(\mathbf{A}), \text{rank}(\mathbf{B})}$?
If you want to re-work on the problems where points are deducted, feel free to turn in (stapled with the original copy) together with HW2 to me so I can re-grade.
Today
- Projection, orthogonal projection, determinant.