Problem of Negative ln

What is this about?

• Is it about the value of $\mathrm{Log}(-1)$?
  • Yes (blu3mo)
  • If we restrict the range of the argument to $\theta \in (-\pi ,\pi ]$, then $\mathrm{Log}z$ is uniquely determined, so I don’t think it’s a problem (takker)
    • The problem is that ln(-1) is not defined in the case of standard logarithm, which is mentioned in 60cc413a79e113000011252b (blu3mo)
    • While researching that, I came across Complex Logarithmic Function
    • I see (takker)
• Is it about the problem of finding $x$ such that $\mathrm{Log}(x)<0$?
  • Now that I think about it, it’s obvious that this is always true for $x<1$