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Feb 5, 2017 at 14:20 vote accept SebiSebi
Feb 5, 2017 at 13:38 history closed David Richerby
Yuval Filmus formal-languages
Duplicate of How can it be decidable whether $\pi$ has some sequence of digits?
Feb 5, 2017 at 13:37 review Close votes
Feb 5, 2017 at 13:38
Feb 5, 2017 at 13:22 comment added David Richerby Not a literal duplicate but it covers the same ground: we have a language $L$ that could be either $L_1$ or $L_2$; both are obviously decidable but we don't know which one really is $L$.
Feb 5, 2017 at 13:08 history edited David Richerby CC BY-SA 3.0
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Feb 5, 2017 at 13:06 answer added Yuval Filmus timeline score: 3
Feb 5, 2017 at 12:42 review First posts
Feb 5, 2017 at 13:42
Feb 5, 2017 at 12:40 history asked SebiSebi CC BY-SA 3.0