If I take a math textbook and transcribe some of its text to obtain a pdf copy, is this copyright infringement? Would I be able to show my transcribed pdf copy to other people or post it online?
Actually when I read a book I create a pdf document that has notes on what I read. The first step is usually to transcribe the text. Afterwards I will modify the text to aid my understanding of the content. I will then use the pdf document as a reference so that I don't have to rely on the book itself. It is easier to recall and remember what I read by reading the notes than reading the original book. I'm essentially replacing the book with my new version. I was wondering if sharing the notes with someone would be problematic.