This could be great, but I doubt maths-heavy subjects can be studied effectively with an iPad. This is kind of sad, because maths-heavy textbooks could be vast

This could be great, but I doubt maths-heavy subjects can be studied effectively with an iPad. This is kind of sad, because maths-heavy textbooks could be vastly improved if they were properly implemented for tablets. Man, if I had the time, I'd love to work on a comprehensive solution for this: e.g. an app for studying maths-heavy material by letting you leverage the power of the device while making user interaction at least as good as ordinary paper - and maybe better. Say, you have a maths or physics textbook to study, and you're about to work on exercises. The solutions to these could then be immediately accessible (no need to enter page numbers), along with an editable list of relevant theorems/quantitative relations or wordy definitions. Wolfram Alpha integration would probably work well for many kinds of problems (e.g. calculus, or more basic algebra), to provide checks to solutions, or even to find solutions that the author didn't provide. I bet this sort of stuff can accelerate learning, and it's just the tip of the iceberg. If this could be done, then you can imagine a physics student graduating with 4 years' worth of textbooks, in-class notes and each and every exercise he/she worked on all properly accessible on one iPad and preserved for the future. (Currently, lots and lots of instructive exercises and worked examples just get chucked out once the course is done.) Maths-heavy subjects obviously introduce many formatting issues, and there's always the added layer of difficulty due to the constant need for exercises and solutions. As far as I can see though, many of these problems have already been solved in other contexts (e.g. LaTeX) - so maybe they 'just' need to be cleverly wired together and coated with an innovative UI. Just a thought.