I hate myself in advance for a reply like this, but I just scrolled randomly towards the loss function part of that document and it reads "You can see also exp

I hate myself in advance for a reply like this, but I just scrolled randomly towards the loss function part of that document and it reads "You can see also expected value notation, were E[x] means an average of x, that is ∑N−1i=0xi/N." I think this is not what E[x] means, i.e. going from expectation to the average (using the sum over n-1 no less) involves a bit more than notation (in this case, assumptions about the DGP). Yes I also hate posts like this, but in the interest of this being a course on mathematics in DL - wanted tollet you know.