books.google.com - Discrete mathematics, also called finite mathematics or Decision Maths, is the study of mathematical structures that are fundamentally discrete, in the sense of not supporting or requiring the notion of continuity. Most, if not all, of the objects studied in finite mathematics are countable sets, such...https://books.google.com/books/about/Discrete_Mathematics_Research_Progress.html?id=_uCQVCAXOJAC&utm_source=gb-gplus-shareDiscrete Mathematics Research Progress