Ebook Concrete mathematics (Second edition) - Ronald L. Graham, Donald E. Knuth, Oren Patashnik

Ebook "Concrete mathematics (Second edition)" was originally intended as an antidote to \Abstract Mathematics," since concrete classical results were rapidly being swept out of the modern mathematical curriculum by a new wave of abstract ideas popularly called the \New Math." Abstract mathematics is a wonderful subject, and there's nothing wrong with it: It's beautiful, general, and useful.