Day 10 in Mat225

Today:

• Announcements:
  • Don't forget about the picnic! And please do let me know if you need a ride....

• Return problems 1.4 (graded 6 and 20)
  • #6, pretty straightforward;
  • #20, not!
    • We're not talking about augmented systems: we're not solving Ax=b
    • Columns of the matrix B are in R⁴, not in R³.
  • One somewhat sophisticated approach to

• Collect 1.5

• Questions/Comments on old stuff?

• Section 1.8:
  • section 1.8 summary

  • Some xlispstat code, illustrating the special matrix transformations of projection, shear, scaling, and rotation.

  • Problems, pp. 79-82:
    • #2
    • #16
    • #18
    • #26

Next time: 2.1 -- matrix operations