Proof of `Random sharp-block forms and their alternating parity` (6th statement)
groundedproofs/Lax342547Proofs/SharpMixerLaw.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
The ordinary and shared testers vanish on sharp directions. Evaluating the remaining form gives the selector sum s_a+t_a multiplying M_a. Apply the bilinear form to basis vectors to recover the whole matrix block.