Definition:Strictly Decreasing/Real Function

Definition
Let $f$ be a real function.

Then $f$ is strictly decreasing iff:
 * $x < y \iff f \left({y}\right) < f \left({x}\right)$

Also known as
A strictly decreasing (real) function is also known as a strictly order-reversing (real) function.

Also see

 * Decreasing Real Function
 * Strictly Increasing Real Function
 * Strictly Monotone Real Function