Cauchy-Bunyakovsky-Schwarz Inequality

Also see

 * Cauchy's Inequality

The special case of the Cauchy-Bunyakovsky-Schwarz Inequality in a Euclidean space is called Cauchy's Inequality.

It is usually stated as:

Also known as
This theorem is also known as the Cauchy-Schwarz inequality or just the Schwarz inequality.

Some sources give it as Bunyakovsky's Inequality or Buniakovski's Inequality.