For tomorrow:

Exercise(s) for you: 

• Complete the last example to a level where you can either rest assured that you don't need any details in class, identify where you fell off ;-) 
• Do the problems for today if you did not already do so.
• Have a look at the rest of the note I posted yesterday, and the slides I linked (only the pages quoted).
• If you still want to do more: Consider a generic 2x2 matrix A with elements a, b, c, d (this space does not support more typography, sorry); calculate p(t) = det(A-tI) and find the zeroes of this polynomial.

I will update the schedule to reflect reality. Problems for Tuesday will be posted tomorrow at latest.