And what this means is that from now on the cla lectures will trail the classes, which, which doesn't matter and is actually quite er a good thing in the sense that what will happen from now on is that we'll first do a topic in the class and then I will give the lecture on it the week after, or possibly even two weeks after, which is okay because it means that then in the lecture I can concentrate on filling in the gaps, straightening out the misunderstandings and generally adding to what we did in the class, rather than leading as it were as I have up until now.