I only now just realized that yesterday’s reading check did not actually include reading material on matrix multiplication! D’oh!!! That information is in chapter 6, and shouldn’t have appeared until the Sep 11th reading check. *Sigh*.

Obviously I will give everybody full credit for quiz items 5c, 5d, 5g, and 5h, which required that knowledge.

(Sorry guys; it’s either age or stress or both.)