books.google.com - Do numbers, sets, and so forth, exist? What do mathematical statements mean? Are they literally true or false, or do they lack truth values altogether? Addressing questions that have attracted lively debate in recent years, Stewart Shapiro contends that standard realist and antirealist accounts of mathematics...http://books.google.com/books/about/Philosophy_of_Mathematics.html?id=9xVErjy9qPQC&q=characterize&utm_source=gb-gplus-sharePhilosophy of Mathematics