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Theorems · Definition · logic and foundations

FirstOrder.Language.DefinableSet

(L : FirstOrder.Language) → {M : Type w} → [L.Structure M] → Set M → Type u₁ → Type (max 0 u₁ w)

Definable sets are subsets of finite Cartesian products of a structure such that membership is given by a first-order formula.

Defined in
Mathlib.ModelTheory.Definability
Cited by
14 results in Mathlib
Foundations
Depth 23 from the axioms · uses Quot.sound
Assumes
FirstOrder.Language.Structure

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