1. The problem statement, all variables and given/known data Hi, the problem is, I'm unsure of how this is read. The context is that I'm currently reading on group homomorphisms and they use this notation. I think it is also used in composition of functions, but I'm unsure of how it is read there as well. h:X-->Y So how would I say h:X-->Y? 2. Relevant equations None 3. The attempt at a solution Searched for a significant time span.