Equality (mathematics)
From Simple English Wikipedia, the free encyclopedia
Two mathematical objects are equal if (and only if) they are exactly the same in every way. This defines a binary relation, equality, marked by the sign of equality "=" in such a way that the statement "x = y" means that x and y are equal.
Equivalence in a more general sense is provided by the construction of an equivalence relation between two sets. A statement that two expressions denote equal quantities is an equation.
[edit] See also
- Equals sign
- Equation
- Inequality
- Logical equality