I've got a problem solving an equation. I want to solve:
Solve[Arg[h]==0, r0, Reals]
h being some imaginary number containing
r0 which is a real number and can vary.
I get an error stating:
The system contains a nonreal constant
I. With the domain
Realsspecified, all constants should be real.
Maybe I've done something wrong but I'm sure that this is not true in general. E.g.:
Solve[Arg[x * I]==0, x, Reals] gets the same error, but it is obvious that x=0 is a solution to this problem.
How can I solve the equation then? I am certain that it had a solution because I've seen dataplots where the curve goes through zero.