1. The problem statement, all variables and given/known data Consider a one-dimensional wave packet with [itex]\phi[/itex](p) = A [itex]\Theta[/itex] ((h/2[itex]\pi[/itex]) / d -|p-p0|) Determine the constant A and find the spatial wave function ψ(x). Ignore temporal evolution. 2. Relevant equations 3. The attempt at a solution Honestly this is a little embarrassing, but the only thing I really need to know is what [itex]\Theta[/itex] is. Is it a constant, or shorthand for e^? If I know that, I should be good. I can't find any info in my notes.