It is hard to pick up keywords in a text where each line gives an important definition... the mathematics I am doing is axiomatic and foundational .. each page of the book abounds with information... and it is very difficult trying to connect definitions or theorems when trying to come up with an idea of what the chapter is about... uni pure maths (algebra, analysis, topology) is very intricate and very subtle connections exist which are sometimes difficult to make even after hours of studying.