no teaching Thursday March 24, but start reading & doing Ch 4

I have very soon had my "four symptom free days", ending my modest covid experience. But I do follow the FHI and UiO rules, and according to these I should not teach Thu Mar 24. I've tried to find a vikar, a substitute, without succeeding. 

By tonight or tomorrow I will have uploaded an extended version of the Exercises and Lecture Notes, with new exercises, partly starting Ch 4. I'll also post a precise curriculum list, from which one sees that Ch 4 is so to speak from the 0.70 to the 0.90 of the full 0.00 to  0.99 of the course. 

I will also upload a few more R scripts, relating (a) to estimation in AR(p), MA(q), ARMA(p,q) models and (b) initial frequency domain methods.