What I have in mind is a set of notes similar to ( but from memory and in my own words ) this set from prof. Kiyoshi Igusa on Group Theory. This is a clear 60-page summary of an undergraduate Group Theory course. It can't replace a book but it will help when you are reviewing. It gives you yet another view on the topic.
Producing PDF documents like this is very simple when you use LaTeX with a good LaTeX IDE. The work on presentation and lay-out issues is zero. This is why most mathematics books look more or less the same. Which is a good thing imo, just think of future generations accessing the vast amounts of new mathematics created in our time.
13-2016 Open letter to Open Source for You (OSFY)
5 months ago