"THE" QUESTION...

Let A = Z (all integers)

and let R be the relation defined on A by a R b if and only if a|b.

Is R an equivalance relation?

"MY" QUESTION...

I'm thrown off by the | symbol - is this saying that a is dividable by b? Which would include the following...

{(1,1),(2,1),(2,2),(3,1),(3,3),(4,1),(4,2),(4,4).. .}

Any help would be greatly appreciated!

Doug