This question could sound weird. I'm reading through a computer science book which is the only reference I personally have about an algorithm, and I'd like to get in touch with the author of the book, which is quite famous in the field. I don't understand some of the conditions stated in order to make the algorithm work. I have another book which implements the algorithm, but some of the key aspects are not actually explained, and somehow I don't find the correspondence with some of theoretic aspect.
Just to clarify the algorithm is a long division algorithm for which I've tried to work out the theoretic aspect exposed in the book by myself. Some of them are fine other instead aren't clear enough, at least to me. I've tried to ask in math exchange for some help I didn't get much information XD.
The issue is that apparently this professor has no longer an e-mail address, and he suggests that if someone wants to get in touch with him it's for the best if you use the "old fashion" mail post service... which I mean... it's not that handy...
Do you have any suggestions?