elementary equivalence

Fetched 2026-10-26 (cache).

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Noun

1. {{lb|en|logic}} A [[relation]] between two [[structure]]s which have the [[property]] that every [[first-order]] [[formula]] is [[valid]] in one structure [[if and only if]] it is valid in the other.

Source: Wiktionary · CC BY-SA 4.0 (Wiktionary dump) · cached copy, not a rewrite.