Official Mathlib source

exists_extension_norm_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/Analysis/Normed/Module/HahnBanach.lean:75
SHA-256: sha256:610783c4be059d6727deb6ab8e7cc149fe379250c9d74ebcff77b547dd9b53e4
Verified bytes: 8,485

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.