books.google.com - This book is about mathematical ideas, about what mathematics means-and why. Abstract ideas, for the most part, arise via conceptual metaphor-metaphorical ideas projecting from the way we function in the everyday physical world. Where Mathematics Comes From argues that conceptual metaphor plays a central...http://books.google.com/books/about/Where_Mathematics_Comes_from.html?id=YXv6SEjTNKsC&q=branches+of+mathematics&utm_source=gb-gplus-shareWhere Mathematics Comes from