Is there a standard way of writing $a$ is divisible by $b$ in mathematical notation?
From what I've search it seems that writing $a \equiv 0 \pmod b$ is one way? But also you can write $b \mid a$ as well (the middle character is a pipe)? And sometimes that pipe is replaced by $3$ vertical dots?
Or is there a way of writing $a$ is a multiple of $b$ which I think means the same thing?
EDIT: thanks for the answers, is there a way to extend this and write something like: $b \mid a$ when $a = k$