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Non-elementarity of $(\omega,C)$ -representable lattices and $(\alpha,C)$ -representable posets
Non-elementarity conjecture. The class of $(\omega,C)$ -representable lattices is not elementary, and the class of $(\alpha,C)$ -representable posets is not elementary for all choice…
Conjectureopenlattice-theory model-theory representable-posetsarXiv posted 2 days ago

Non-elementarity of (ω,C)(\omega,C)(ω,C)-representable lattices and (α,C)(\alpha,C)(α,C)-representable posets