Jean-Michel Veuillen writes: > There are other possibilities to obtain hypercomputers or Infinite Time > Turing Machines: > > For instance, from general relativity: put a computer in orbit around a > black hole, > start an infinite computation on it, arrange that the results are sent to > you by radio, > and jump into the black hole: > when you reach the horizon, you get the result of the infinite computation > (and witness the end of the rest of the universe). > > For a survey: arxiv.org/pdf/math.LO/0209332

...and burn to death as infinite amounts of radiation fall on you in a finite time? Maybe the universe is like a character from a spy novel: it could tell us what it knows (solving the halting problem, etc.), but then it has to kill us. Hal F.