Official Mathlib source

FirstOrder.Language.exists_elementarySubstructure_card_eq

This declaration comes from Mathlib. Follow the official immutable link below to inspect the exact upstream source; ProofAtlas does not mirror or claim authorship of it.

Exact upstream reference

Package: mathlib
Repository: https://github.com/leanprover-community/mathlib4
Commit: 5e932f97dd25535344f80f9dd8da3aab83df0fe6
Source path: Mathlib/ModelTheory/Skolem.lean:122
SHA-256: sha256:85c5fa3fd4f76381b02d46a8bfd515cceb14254543e0afae95004c1fc07137b0
Verified bytes: 6,227

Open source in Mathlib

Why there is no source download here

ProofAtlas links to the official immutable Mathlib source. It does not mirror the Lean file, relicense upstream work, publish a ProofAtlas source archive, or claim a first-party source footprint.