0 a region in space where gravity is so strong that nothing, not even light, can escape --
1 a region in space where the force of gravity is so strong that nothing, not even light, can escape from it --
2 an activity or organization on which very large amounts of money are spent but which does not produce any profit or useful result: --
Fears that the operation would be a black hole proved well-founded.
3 a large amount of money that is owed by a company or government: --
Now, imagine one of the particles were to cross the event horizon of the black hole.
The effect is often described as resulting from virtual pair production on the horizon of a black hole.
Then one of the particles is inside the black hole and one outside.
So we must suppose that the information that falls into the black hole is lost to us and only available within the black hole itself.
What if the universe is not slated to contract into a black hole or expand into nothing?
We assume that there is at most one black hole in the network.
The minimum number of agents capable of identifying a black hole is two.
Now it is possible to use the time-out mechanism to locate the black hole in any graph, with only two agents, as follows.