(ch:set:theory)=
# Algebra

This chapter provides a basic introduction to the
notion of sets, relations, functions, sequences,
groups, rings, polynomials, etc..


(sec:alg:algebraic_structure)=
## Algebraic Structures

In mathematics, the term *algebraic structure* refers to an arbitrary set 
with one or more operations defined on it.

* Simpler algebraic structures include groups, rings, and fields. 
* More complex algebraic structures like vector spaces are built 
  on top of the simpler structures.