Proof of `Selected tensor blocks of actual pure obstructions` (2nd statement)
groundedproofs/Lax342547Proofs/SelectedBlocks.lean · lax-342547
What this proof establishes
no assumptions
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
Project the nominal pure annihilator to this endpoint. Extract the selected label in both factors. Its base moment is killed by its affine ray quotients, or by no rays off its star, giving a scalar point or zero.