Definition:Unity


 * Abstract Algebra:
 * The concept of a unity, which is the abstraction of the concept of 1|the number $1$ (one)
 * The unity of a ring
 * The unity of a field


 * Arithmetic, Number Theory, and so on:
 * Another word for 1|the number $1$ (one), when it is important to call attention to its numeric properties.

Also see

 * Definition:Unit
 * 1