### What did we do this week?

Here's what happened in LEC 001, with textbook references. The timing in LEC 002 might be slightly different.

- Sept. 8: first day of class
- Sept. 11-15: Chapters 1.1, 1.2, 1.3
- Sept. 18-22: 1.3 (continued) Quiz 1 on 1.1-1.3; an example from 8.1 (ISBN). 2.1: starting to solve linear equations
- Sept. 25: 2.2: row echelon form and reduced row echelon form. The definition of "span".

- Sept. 27: 2.3: span and linear (in)dependence. We saw
how to answer questions about span and linear independence using the
techniques for solving systems of linear equations.
- Oct. 2, 4: 3.1, 3.2: matrices and matrix algebra.