Algebra (from Arabic. الجبر, «Al-Jabr" - replenishment) - a branch of mathematics that can be roughly described as a generalization and extension of arithmetic. The word "algebra" is also used in the names of various algebraic systems. In a broader sense, understand algebra math section devoted to the study of operations on the elements of an arbitrary nature, which generalizes the usual operations of addition and multiplication of numbers.

Algebra - is the study of algebraic systems up to isomorphism.