Invertable Time

We prove that time-travel is impossible by showing that the inverse-time function does not exist.

1. Note that for the function time $T(x):V\to W$, $V\to W$ is not one-to-one, as multiple events can lead to the same outcome-event. Then, the map is not Injective
2. Note that for the set of all possible events $W$, there are events not possible at all, then the map is not Surjective
3. Then, since it is not surjective or injective, an Inverse Function does not exist Thus, there is no inverse time function.