I need help with the following question:
Define a relation R on natural numbers by aRb whenever ab is a square. show R is an equivalence relation.
I am having trouble even before that. We are unsure if we are reading the question right or not. We are not real familiar with equivalence relations. Let's say a=8 and b=2. Then ab=16 which is a square. So aRb by reflexivity because they are elements of natural numbers or what?