Proof of `Random sharp-block forms and their alternating parity` (1st 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
Prescribe the chosen forward block and set its reverse to zero. Disjoint index sets make these prescriptions consistent, so the alternating-block observation is a surjective linear map and hence has the uniform law.