The ordered-field IP conjecture on the natural numbers

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Let ⊕\oplus and ⊗\otimes be binary operations on N\mathbb{N} such that (N,⊕,⊗)(\mathbb{N},\oplus,\otimes) is a field. Ordered-field IP conjecture. The expansion (N,<,⊕,⊗)(\mathbb{N},<,\oplus,\otimes) has the independence property. This conjecture is presented as a special case of the directed-family conjecture and would obstruct tame expansions interpreting an infinite field on a discrete domain.

References

Primary source

Erik Walsberg, “Externally definable quotients and NIP expansions of the real ordered additive group”, arXiv:1910.10572 (2020).

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