material

Hi, I will put my material (slides etc) into sub-directories visible in the tabs on the left. They will hopefully be numbered and named consistently, so it should be easy to figure out which is which. The numbers won't correspond directly to "number of the week" or "number of the lecture", rather to one portion of covered material (like a one chapter). I typically won't hyper-link them in into the "timeplan". 

for today: in one of the trees (the one with the type of the array a[index]) one of the nodes was incorrectly ``typed'' or annotated. I replaced the slides with the corrected version.