Abstract
This chapter sketches the mathematical prerequisites that software engineers should be familiar with, and we discuss fundamental concepts such as sets, relations, functions, arithmetic, and trigonometry. A set is a collection of well-defined objects, and it may be finite or infinite. A relation between two sets A and B indicates a relationship between members of the two sets and is a subset of the Cartesian product of the two sets. A function is a special type of relation such that for each element in A there is at most one element in the codomain B. Number theory is the branch of mathematics that is concerned with the mathematical properties of the natural numbers and integers. Trigonometry is the branch of mathematics that deals with the measurement of sides and angles of triangles and the relationships between them, and it has many applications in science and engineering.
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