Definition:Salem Number

Definition
A Salem number is a real algebraic integer $\alpha$ such that:
 * $\alpha > 1$
 * its conjugate roots all have absolute value no greater than $1$, at least one of which has absolute value exactly $1$.

Also known as
The Salem numbers are also known as the Salem constants.

Also see

 * Definition:Salem Constant, believed to be the smallest Salem number.