Subject:
Mathematics
,
Working Paper
, Title:
There exists a non-recursively enumerable set {n∈N: φ(n)} which is co-recursively enumerable, where the formula φ(n) is short and can be easily translated into a first-order formula in Peano arithmetic
, Authors:
Apoloniusz Tyszka
Version 6 posted 12 May 2026
131
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