Announcement

• Midterm graded.

• HW5 due Nov 15 @ 11:59pm on Gradescope/BruinLearn.

Today

• Feedback on midterm.

  • Q1.4: R(AB) ⊆ R(B)
  • Q2.5: Example of rank(A+B) = rank(A) + rank(B)
  • Q3.2: tr(ABC) = tr(BCA) = tr(CAB)
  • Q4.3: Axy’ (2mn+mp flops)
  • Q4.5: (D+ab’)x (5n flops)
  • Q7.2: Hessian
  • Q8.7: S1 and S2 are essentially disjoint

• Determinant.