Day 16 in Mat225

Today:

• Return 2.1 problems

• Collect 2.2 problems

• Questions/Comments on old stuff?
  • for #5, #9, #42, and a look at the proof structure of the invertible matrix theorem (refer to Figure 1, p. 129).

  • Condition number applet

• Section 2.4:
  • section 2.4 summary
  • Matrix products as special partitioned matrices:
    • inner- or outer-products, and the effect of a various parts of a factorization on a product.
    • outer-product sum

• Section 2.5:
  • section 2.5 summary