Official Mathlib source

Subgroup.card_subgroup_dvd_card

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/GroupTheory/Coset/Card.lean:69
SHA-256: sha256:cb3efb11057211d161637ba7e6c75d64271faa95e5bdafff96f82168329b236e
Verified bytes: 3,506

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.