I'm interested in this subject. This is a graduate text and I believe the prereqs are mostly a math degree, which I somewhat have(B.S in Applied Math from a few years back). The thing is, I forgot details about things. For example, I know how to do an epsilon delta proof and can read one when presented, but I don't remember the particular theorems/definitions( uniform convergence, ratiotests etc), I remember the philosophy behind a vector space/subspace of linear algebra, but I don't remember all the details of factorizations of matricies, all the theorems etc. Is it possible to study this book while just looking up the needed details on the side as I go along?