Pocket Mathematics for Android just received an update with new chapter - sets.

In mathematics, a set is a collection of distinct objects, considered as an object in its own right. Developed at the end of the 19th century, set theory is now a ubiquitous part of mathematics, and can be used as a foundation from which nearly all of mathematics can be derived.

New chapter - sets contains the following sections:

- Algebra of sets
- Marking of sets
- Union of sets
- Sets difference
- Intersection of sets
- Complement of a set
- Equality of sets
- Inclusion of sets
- Disjoint sets
- Cartesian product of sets
- Laws of set algebra
- Relationships between the set elements
- Types of relations between elements
- Cardinality of a set

Pocket Mathematics for Android is available in the Google Play Store: