Undecidability of the degree structure of primitive recursive m-reducibility


Kalmurzayev B.S. Bazhenov N.A. Iskakov A.M.
1 June 2025Oxford University Press

Journal of Logic and Computation
2025#35Issue 4

Let Cmpr be the upper semilattice of degrees of computable sets with respect to primitive recursive m-reducibility. We prove that the first-order theory of Cmpr is hereditarily undecidable.

first-order theory , m-reducibility , primitive recursive function , undecidability

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Nazarbayev University

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