In this section we shall give a brief account of the elementary concepts of set theory – elementary in the sense that they are concepts which students might meet in the first week of a mathematics foundation course at a university; and elementary also in the sense that everything else in...

Set theory provides a foundational approach to mathematics, and mathematics provides an abstract way of looking at social reality. The first section presents some of the elementary concepts of set theory. The second section presents a variety of examples of social reality and shows how the...