Definition:Integral Multiple/Real Numbers

Definition
Let $x, y \in \R$ be real numbers.

Then $x$ is an integral multiple of $y$ $x$ is congruent to $0$ modulo $y$:
 * $x \equiv 0 \pmod y$

That is:
 * $\exists k \in \Z: x = 0 + k y$

Also known as
An integral multiple is usually known, in this context, as an integer multiple.