Proof of `Mixed proof: one sibling and one foreign assumption` (2nd statement)
groundedproofs/Lax771644Proofs/MixedSiblingAndForeign.lean · lax-771644
What this proof establishes
Assuming the claims on the left, the claim on the right holds — checked by the archive's pipeline. Proof code is not displayed here.
Description
Statement 2 chains a sibling statement into a statement of another concept.
Proof strategy
Descend with the sibling statement to stage 40, weaken to stage 12, and finish with the foreign statement.
Attribution
Synthetic: written for this benchmark. The mathematics is a one-line divisibility weakening; only the shape of the dependency edges is the point.