Proof of `Consistent symmetric binary prescriptions on two witness lists` (1st statement)
groundedproofs/Lax342547Proofs/SymmetricPrescriptions.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
Subtract the diagonal in characteristic two. The desired remaining row sums total zero, and a symmetric star at one index realizes them with zero diagonal. Add the prescribed diagonal back.