The halting probability of a prefix-free universal Turing machine — a real number encoding, in its binary expansion, the halting behaviour of every program. Formally DEFINABLE, but proven to be *non-computable*: no algorithm can output its…
The halting probability of a prefix-free universal Turing machine — a real number encoding, in its binary expansion, the halting behaviour of every program. Formally DEFINABLE, but proven to be *non-computable*: no algorithm can output its…