Delphi.science

Effective isomorphism from one-one equivalence

Source: github.com/Arthur742Ramos/Math-Formalization/tree/8c6bf56d8…

Arthur Freitas Ramos, David Barros Hulak, Ruy José Guerra Barretto de Queiroz

Palomar Registrypalomar/PALOMAR-2026-11-03-000008Nov 3, 2026math.LOscore 0

Formalizes the effective-isomorphism theorem for arbitrary predicates on natural numbers: mutual computable injective reductions yield a computable permutation with computable inverse preserving membership.

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